Reader's Dictionary
Catholic Terms and Definitions
This dictionary gathers Catholic, theological, sacramental, crisis, and difficult terms used throughout the site. Highlighted words in chapters link directly back here so readers can learn as they go.
The definitions are written in traditional Catholic usage and are meant to educate, steady, and clarify, especially when a chapter depends on a term that may not be familiar or may be misunderstood.
A
Absolution
Sacramental TheologyThe priestly remission of sins in the sacrament of Penance by the authority of Christ and His Church.
Also linked as: absolve, absolved
Amendment
Moral TheologyThe sincere turning from sin toward a changed life, including practical steps to avoid the fault and its occasions.
Also linked as: amend, amended
Antipope
AuthorityA false claimant to the papal office who presents himself as pope without possessing the authority of the true Roman Pontiff.
Also linked as: antipopes
Apostasy
DoctrineThe total repudiation of the Christian faith after it has been received and professed.
Also linked as: apostate
Apostolicity
EcclesiologyOne of the four marks of the Church: her continuity with the Apostles in doctrine, mission, and lawful authority.
Authority
AuthorityThe lawful power received from God to teach, govern, judge, and bind; in the Church, authority is ministerial and exists to guard truth, worship, and the salvation of souls.
Also linked as: authority, authorities
B
Blasphemy
Moral TheologySpeech, thought, or conduct that dishonors God, Our Lord, Our Lady, the saints, or sacred things by contempt, mockery, hatred, or profane irreverence.
Also linked as: blasphemies, blasphemous
Bride
EcclesiologyThe true Church considered in her purity, fidelity, and union with Christ the Bridegroom; she receives and guards His truth and cannot make peace with error as though it were charity.
Also linked as: the Bride, Bride of Christ
C
Calumny
Moral TheologyInjuring another's good name by false accusation or knowingly spreading what is untrue.
Also linked as: calumnies, slander, slandered, slanderous
Calvary
ScriptureThe hill of Christ's Crucifixion, also called Golgotha, where the redemptive sacrifice of the Cross was offered and where Marian and ecclesial fidelity are revealed with special clarity.
Charity
Moral TheologyThe supernatural virtue by which God is loved above all things for His own sake, and neighbor is loved in God.
Church
EcclesiologyThe visible and divine society founded by Jesus Christ to teach, govern, sanctify, and save souls through true doctrine, lawful authority, and sacramental worship.
Also linked as: the Church
Conscience
Moral TheologyThe judgment of practical reason by which a person recognizes what ought to be done or avoided before God.
Also linked as: consciences
Contempt
Moral TheologyA willful despising of what should be honored or loved; toward persons it treats a soul as beneath charity, and toward holy things it attacks reverence.
Also linked as: contemptuous, contemptuously
Contrition
Spiritual LifeSorrow for sin together with hatred of it and a firm purpose of amendment.
Counterfeit
DiscernmentAn imitation of Catholic reality that preserves names, appearances, sentiments, or structures while contradicting the doctrine, worship, authority, or holiness of the true Church.
Also linked as: the Counterfeit, counterfeit church, counterfeit religion
Covetousness
Moral TheologyDisordered desire for another's goods, state, position, or advantages, contrary to gratitude, justice, and trust in God.
Also linked as: covet, coveted, coveting
D
Detachment
Spiritual LifeFreedom from disordered clinging to created things so that the soul may love God and use His gifts rightly.
Also linked as: detached
Detraction
Moral TheologyUnjustly harming another's reputation by revealing real faults or sins without a proportionate reason.
Also linked as: detract, detracting
Doctrinal Error
DoctrineFalsehood opposed to revealed truth; in matters of faith, worship, morals, or salvation, doctrinal error is not harmless when received, taught, loved, or excused.
Also linked as: doctrinal errors
Dogma
DoctrineA truth revealed by God and proposed by the Church as binding for belief.
Also linked as: dogmatic
E
Ecclesiology
EcclesiologyThe branch of theology that studies the Church: her nature, marks, authority, mission, worship, and relation to Christ.
Also linked as: ecclesiology, ecclesioogy
Eclipse
DiscernmentA condition in which the true Church's visibility is obscured by occupation, confusion, false appearances, persecution, or widespread apostasy, without the Church ceasing to exist or losing her marks.
Also linked as: eclipse of the Church, eclipsed
Ecumenism
ErrorsIn its modern false form, the attempt to create Christian unity by minimizing, suspending, or relativizing Catholic doctrine.
Envy
Moral TheologySadness at another's good as though it lessened oneself, often leading to resentment, rivalry, detraction, or secret delight in another's fall.
Also linked as: envious, jealousy, jealous
Esotericism
ErrorsA spirituality or body of teaching claiming hidden knowledge, secret techniques, or inner enlightenment apart from God's public revelation and the Church's authority.
Also linked as: esoteric
F
False Ecumenism
ErrorsThe counterfeit unity that treats doctrinal contradiction, false worship, or religious mixture as though they could be reconciled with Catholic charity.
Also linked as: false ecumenism
False Mercy
ErrorsA counterfeit compassion that refuses to name sin, error, judgment, repentance, or danger, leaving souls comfortable where true mercy would call them out.
Also linked as: false mercy
False Obedience
ErrorsThe misuse of obedience to make souls cooperate with error, silence truth, accept contradiction, or obey men against God.
Also linked as: false obedience
False Peace
ErrorsA counterfeit peace purchased by silence, compromise, or refusal to warn; it calms the surface while leaving souls exposed to danger.
Also linked as: false peace
Fortitude
Moral TheologyThe virtue that strengthens the soul to do good and endure evil steadily, especially when duty is difficult or costly.
Frivolity
Moral TheologyLight-minded attachment to trifles, amusement, or attention in a way that weakens seriousness about God, duty, or the soul.
Also linked as: frivolous
G
Gluttony
Moral TheologyDisordered desire for food, drink, or bodily satisfaction that weakens reason and self-command.
Also linked as: gluttonous
Gossip
Moral TheologyIdle or curious talk about others that feeds appetite for private matters and often leads to detraction, rash judgment, or injury to charity.
Also linked as: gossiped, gossiping
Gothic
Catholic CivilizationA style of Catholic architecture and art marked by verticality, light, order, and symbolic richness, often used to lift the soul toward heavenly worship and the holy city.
Also linked as: gothic, gothic style, gothis
Grace
TheologyA supernatural gift from God that heals, elevates, and enables the soul to know, love, and obey Him.
H
Heresy
DoctrineThe obstinate denial or doubt of a truth that must be believed with divine and Catholic faith.
Also linked as: heretical, heretic, heretics
Hireling
DiscernmentA shepherd in name who does not guard the flock when danger comes; he prefers comfort, approval, or institutional safety to warning souls against wolves and error.
Also linked as: hirelings
Human Respect
Moral TheologyThe sinful fear of human opinion that leads a soul to hide, soften, or betray duty toward God.
Also linked as: human respect
Humility
Moral TheologyThe virtue by which a soul knows the truth about itself before God and refuses pride, vanity, and self-exaltation.
Also linked as: humble
I
Immodesty
Moral TheologyA failure to guard the fitting reserve of body, dress, speech, behavior, or attention according to purity and charity.
Also linked as: immodest, immodestly
Impurity
Moral TheologyA violation of chastity in thought, desire, look, word, action, or deliberate occasion.
Also linked as: impure, impurely
Indefectibility
EcclesiologyThe property by which the true Church cannot lose her essential constitution, truth, or divine mission.
Indifferentism
ErrorsThe error that doctrinal truth is not necessary or that different religions may be treated as spiritually equivalent.
Infallibility
EcclesiologyThe divine protection by which the Church, under the conditions established by Christ, cannot teach error in faith or morals.
Irreverence
Moral TheologyA failure to give fitting honor to God, sacred persons, sacred places, sacred things, or holy duties.
Also linked as: irreverent, irreverently, irrevelent
J
Jurisdiction
AuthorityThe lawful power to govern, judge, and bind within the Church.
Justice
Moral TheologyThe virtue by which one gives to God and neighbor what is due.
Also linked as: justly, unjust, unjustly
Justification
TheologyThe passage from the state of sin to the state of grace, by which the soul is cleansed, made just before God, and given sanctifying grace.
Also linked as: justification, justify, justified
L
Licit
Sacramental TheologyLawful according to the Church's rule or discipline, even when distinct from the question of validity.
Lust
Moral TheologyDisordered desire for venereal pleasure apart from the order of chastity, marriage, and God's law.
Also linked as: lustful
M
Magisterium
DoctrineThe Church's divinely instituted teaching office, exercised by lawful shepherds in fidelity to revelation.
Marks of the Church
EcclesiologyThe objective signs by which the true Church is known: one, holy, Catholic, and apostolic.
Also linked as: four marks, four marks of the Church
Modern Syncretism
ErrorsThe attempt to combine Christianity with non-Christian beliefs, rites, or spiritual systems as though contradictory religions could be harmonized into one acceptable path.
Also linked as: syncretism
Modernism
ErrorsThe synthesis of heresies that subjects dogma, worship, and authority to modern consciousness, experience, and change.
Modesty
Moral TheologyThe virtue that guards fitting reserve in dress, speech, bearing, and conduct so that the person is not displayed or used contrary to purity and dignity.
Also linked as: modest, modestly
Mortal Sin
Moral TheologyA grave sin committed with full knowledge and deliberate consent, destroying charity in the soul.
N
Novus Ordo
LiturgyThe postconciliar rite of Mass introduced after Vatican II and set against the traditional Roman rite.
O
Obedience
Moral TheologyThe virtue by which a soul submits rightly to God and to lawful authority under God.
Also linked as: obey, obeyed, obeying
Omission
Moral TheologyA failure to do a good act or fulfill a duty that one was obliged and able to do.
Also linked as: omissions
Omnipotence
TheologyThe all-powerful might of God, by which He can do all that is consistent with His divine nature and wisdom; His greatest works often appear under humility, hiddenness, and grace rather than worldly display.
Also linked as: omnipotence, omnipotent
Organized Religion
ReligionReligion as visibly structured in doctrine, worship, authority, and communal life; Christ founded not a private spirituality but a visible Church.
P
Paganism
ErrorsFalse religion that worships creatures, false gods, natural powers, or man-made rites instead of the one true God revealed in Jesus Christ.
Also linked as: pagan, pagans
Patience
Moral TheologyThe virtue by which a soul bears suffering, delay, contradiction, or trial without surrendering charity or duty.
Also linked as: patient, patiently
Penance
Sacramental TheologyBoth the sacrament of reconciliation and the acts of repentance imposed or undertaken for the remission of sin.
Pride
Moral TheologyDisordered self-exaltation by which the soul resists its dependence on God and seeks its own excellence apart from truth.
Also linked as: proud
Private Judgment
ErrorsThe principle that the individual self remains the final judge of doctrine, worship, and authority, rather than submitting to what God has revealed through His Church.
Private Religion
ReligionA self-directed spirituality detached from the visible Church, sacramental worship, and lawful authority; contrary to what Christ established.
Prudence
Moral TheologyThe virtue that judges rightly what should be done here and now, choosing fitting means to a good end.
Also linked as: prudent, prudently
Purity
Moral TheologyCleanness of heart, intention, imagination, speech, and body according to chastity and the love of God.
Also linked as: pure
R
Rash Judgment
Moral TheologyJudging another's guilt, motives, or interior state without sufficient evidence or rightful authority.
Also linked as: rash judgment, rashly judge, judging rashly, judged rashly
Recognition
DiscernmentThe act of identifying the true Church, true doctrine, true worship, or a true shepherd by the marks and principles God has given, rather than by comfort, habit, or outward popularity.
Recollection
Spiritual LifeInterior quiet and gathered attention before God, opposed to dissipation, distraction, and restless scattering of the soul.
Also linked as: recollected
Recusant
Church HistoryA Catholic who refused conformity to an imposed false religious order, especially English Catholics who remained faithful under penal laws after the Protestant revolt.
Also linked as: recusants, reclusant, reclusants
Remnant
EcclesiologyThe faithful portion who persevere in true doctrine, worship, and obedience when many fall away; Catholics who remain under the true marks of the Church in a time of eclipse and apostasy.
Also linked as: remnant
Restitution
Moral TheologyThe duty to repair, as far as possible, unjust harm done to another's goods, reputation, rights, or peace.
Also linked as: restore, restored
S
Sacrament
Sacramental TheologyAn outward sign instituted by Christ to give grace.
Also linked as: sacraments, sacramental
Sacrilege
Moral TheologyThe profanation or irreverent treatment of a sacred person, place, thing, rite, or sacrament.
Also linked as: sacrileges, sacrilegious, sacrilrge
Scandal
Moral TheologyWords, actions, omissions, or example that lead another soul toward sin or weaken him in virtue and faith.
Also linked as: scandalize, scandalized, scandalous
Schism
EcclesiologyThe rupture of ecclesial unity by refusal of due subordination or communion within the Church.
Scrupulosity
Spiritual LifeA troubled fear of sin where there is not sufficient reason, often leading the soul to anxiety, repeated confession, or distrust of sound counsel.
Also linked as: scruples, scrupulous
Secularism
ErrorsThe false principle that personal and public life should be organized without submission to God's revealed truth, often presenting itself as neutral while functioning as a rival religion.
Also linked as: secular
Sloth
Moral TheologySpiritual laziness or sadness before the good God asks, making the soul negligent in prayer, duty, or conversion.
Also linked as: slothful
T
Temperance
Moral TheologyThe virtue that moderates the desire for pleasures, especially bodily pleasures, according to reason and God's law.
Also linked as: temperate
Temptation
Spiritual LifeAn attraction, suggestion, or pressure toward sin, whether from the world, the flesh, or the devil.
Also linked as: temptations, tempted
Tradition
DoctrineThe transmission of revealed truth handed down from the Apostles in the life, worship, and teaching of the Church.
Also linked as: Sacred Tradition
Transcendence
TheologyThe reality of God as above, beyond, and not limited to the created order, while still truly present and acting within it.
Also linked as: transcendent
Transubstantiation
Sacramental TheologyThe change of the whole substance of bread and wine into the Body and Blood of Christ in the Holy Mass.
True Church
EcclesiologyThe Church founded by Christ, knowable by her marks, doctrine, worship, sacraments, authority, and holiness, even when her visibility is obscured by crisis.
Also linked as: the true Church
U
Universal
EcclesiologyBelonging to the whole rather than to one part only; in Catholic usage it often points to the Church's catholicity, meaning fullness of truth, worship, and mission for all nations under one faith.
Also linked as: universality
Usurpation
AuthorityThe unlawful seizure or exercise of an office, mission, or authority not truly received.
Also linked as: usurper, usurpers
V
Valid
Sacramental TheologyHaving the reality and effect intended; in sacramental theology, truly conferring what the sacrament signifies.
Also linked as: validity, invalid, invalidity
Venial Sin
Moral TheologyA lesser sin that wounds charity but does not destroy it as mortal sin does.
Vice
Moral TheologyA stable evil habit or disordered tendency that inclines the soul toward sin.
Also linked as: vices
Virtue
Moral TheologyA stable good habit by which the soul is disposed to act rightly according to reason enlightened by faith and grace.
Also linked as: virtues
Visibility of the Church
EcclesiologyThe property by which the Church Christ founded can be known as a real society by her marks, doctrine, worship, sacraments, and authority, though her visibility may be obscured in times of crisis.
Also linked as: visible Church
W
Whore
DiscernmentApocalyptic and polemical language for counterfeit religion in adulterous commerce with false worship, false doctrine, worldly power, and peace purchased by betrayal.
Also linked as: the whore, whore of Babylon
Wolf
DiscernmentA false shepherd or teacher who appears harmless, pious, or authoritative while leading souls away from truth, true worship, repentance, or the safety of the flock.
Also linked as: wolves, wolf in sheep's clothing, wolves in sheep's clothing
Works of Mercy
Moral TheologyCharitable works by which Catholics aid the bodily and spiritual needs of their neighbor for the love of God.
Also linked as: work of mercy, works of mercy
Worldliness
Spiritual LifeAttachment to the spirit, honors, pleasures, judgments, and habits of the world in a way that weakens fidelity to God.
Also linked as: worldly