25 Common Latin Phrases in EnglishMeanings, examples, and when to use them
Latin phrases still appear in law, business, academia, literature, and everyday speech. Learn the expressions that actually show up in modern English.
The best Latin phrases are not decorative. They compress ideas that would otherwise take a full sentence: legal status, logical error, personal responsibility, time, mortality, and practical judgment.
Use them sparingly. A phrase like bona fide or de facto can sharpen a sentence. Too many Latinisms make writing feel performative.
ad hoc
Meaning: for this specific purpose
Example: We formed an ad hoc committee to handle the launch issue.
ad hominem
Meaning: aimed at the person rather than the argument
Example: Calling the speaker lazy is ad hominem if it avoids the evidence.
ad infinitum
Meaning: without end
Example: The debate could continue ad infinitum if nobody defines the terms.
ad nauseam
Meaning: to a tiresome or excessive degree
Example: The point has been repeated ad nauseam.
bona fide
Meaning: genuine; made in good faith
Example: She received a bona fide offer from the publisher.
carpe diem
Meaning: seize the day
Example: Carpe diem is not recklessness; it is refusing to postpone life forever.
caveat emptor
Meaning: let the buyer beware
Example: Private sales often operate under caveat emptor.
cogito ergo sum
Meaning: I think, therefore I am
Example: Descartes used cogito ergo sum as a foundation for certainty.
de facto
Meaning: in fact; in practice
Example: She became the de facto leader before the title was official.
de jure
Meaning: by law; officially
Example: He was the de jure owner, but his sister ran the business.
deus ex machina
Meaning: an implausible outside rescue
Example: The sudden inheritance felt like a deus ex machina ending.
ergo
Meaning: therefore
Example: The premise is false, ergo the conclusion cannot stand.
et cetera
Meaning: and the rest; and so on
Example: Bring a notebook, pen, charger, et cetera.
ex post facto
Meaning: after the fact; retroactive
Example: The rule cannot be applied ex post facto.
habeas corpus
Meaning: a legal order requiring detention to be justified
Example: The lawyer filed a habeas corpus petition.
in absentia
Meaning: in one's absence
Example: The award was accepted in absentia.
in medias res
Meaning: in the middle of things
Example: The novel begins in medias res, with the escape already underway.
in situ
Meaning: in the original place
Example: The artifact was photographed in situ before removal.
ipso facto
Meaning: by that very fact
Example: Signing the contract made her ipso facto responsible for delivery.
magna cum laude
Meaning: with great honor
Example: He graduated magna cum laude.
mea culpa
Meaning: my fault
Example: The founder issued a public mea culpa after the outage.
memento mori
Meaning: remember that you must die
Example: For Stoics, memento mori is a reminder to spend time wisely.
modus operandi
Meaning: method of operation
Example: The repeated pattern revealed the fraudster's modus operandi.
non sequitur
Meaning: a conclusion that does not follow
Example: His reply was a non sequitur: true, perhaps, but irrelevant.
per se
Meaning: in itself
Example: Ambition is not harmful per se; unrestrained ambition can be.
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