reason.
A cause:
Meaning & usage
A cause: That which causes something: an efficient cause, a proximate cause.
The reason this tree fell is that it had rotted.
A cause: A motive for an action or a determination.
He made reason with his boss about taking a day off.
The reason I robbed the bank was that I needed the money.
A cause: An excuse: a thought or a consideration offered in support of a determination or an opinion; that which is offered or accepted as an explanation.
A cause: A premise placed after its conclusion.
Rational thinking (or the capacity for it); the cognitive faculties, collectively, of conception, judgment, deduction and intuition.
Mankind should develop reason above all other virtues.
Something reasonable, in accordance with thought; justice.
Ratio; proportion.
Where this word comes from
From Middle English resoun, reson, from Anglo-Norman raisun (Old French raison), from Latin ratiō, from ratus, past participle of reor (“reckon”), ultimately from Proto-Indo-European *h₂reh₁- (“to think”), reanalysed root of *h₂er- (“to put together”). Displaced native Middle English reden (found in compounds), from Old English rǣden (“condition, stipulation, calculation, direction”), from the same Proto-Indo-European source (compare West Frisian reden (“reason”), Dutch reden (“reason”)). Doublet of ration and ratio.
To deduce or come to a conclusion by being rational.
To perform a process of deduction or of induction, in order to convince or to confute; to argue.
To converse; to compare opinions.
To arrange and present the reasons for or against; to examine or discuss by arguments; to debate or discuss.
I reasoned the matter with my friend.
To support with reasons, as a request.
To persuade by reasoning or argument.
to reason one into a belief; to reason one out of his plan
To overcome or conquer by adducing reasons.
to reason down a passion
To find by logical process; to explain or justify by reason or argument.
to reason out the causes of the librations of the moon
Where this word comes from
From Middle English resoun, reson, from Anglo-Norman raisun (Old French raison), from Latin ratiō, from ratus, past participle of reor (“reckon”), ultimately from Proto-Indo-European *h₂reh₁- (“to think”), reanalysed root of *h₂er- (“to put together”). Displaced native Middle English reden (found in compounds), from Old English rǣden (“condition, stipulation, calculation, direction”), from the same Proto-Indo-European source (compare West Frisian reden (“reason”), Dutch reden (“reason”)). Doublet of ration and ratio.
A wall plate.
Where this word comes from
From Middle English reason, reson, resen, rasen, from Old English ræsn (“beam, rafter, ceiling, wall panel”), probably from Proto-West Germanic *raʀn (“house”), from Proto-Germanic *razną (“house, dwelling”), from Proto-Indo-European *h₁erh₁- (“to rest”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.