reason

[ ree-zuhn ]

/ ˈri zən /

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See synonyms for: reason / reasoned / reasoning / reasons on Thesaurus.com

noun

a basis or cause, as for some belief, action, fact, event, etc.: the reasons for declaring war.

a statement presented in justification or explanation of a belief or action: I dare you to give me one good reason for quitting school!

sufficient cause, as produced by a situation that makes an act, feeling, etc., obviously proper or appropriate: After the mess he made of our yard, we have good reason to look for another landscaper.

the mental powers concerned with forming conclusions, judgments, or inferences: Effective leadership requires a person of reason.

sound judgment; good sense.

normal or sound powers of mind; sanity.

Logic. a premise of an argument.

Philosophy.

the faculty or power of acquiring intellectual knowledge, either by direct understanding of first principles or by argument.
the power of intelligent and dispassionate thought, or of conduct influenced by such thought.
Kantianism. the faculty by which the ideas of pure reason are created.

verb (used without object)

to think or argue in a logical manner.

to form conclusions, judgments, or inferences from facts or premises.

to urge reasons which should determine belief or action.

verb (used with object)

to think through logically, as a problem (often followed by out).

to conclude or infer.

to convince, persuade, etc., by reasoning.

to support with reasons.

OTHER WORDS FOR reason

1 purpose, end, aim, object, objective.

3 excuse, rationalization.

4 understanding, intellect, mind, intelligence.

11 persuade.

See synonyms for reason on Thesaurus.com

QUIZ

WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?

Smoothly step over to these common grammar mistakes that trip many people up. Good luck!

Question 1 of 7

Fill in the blank: I can’t figure out _____ gave me this gift.

who

whom

TAKE THE QUIZ TO FIND OUT

Idioms about reason

bring (someone) to reason, to induce a change of opinion in (someone) through presentation of arguments; convince: The mother tried to bring her rebellious daughter to reason.

by reason of, on account of; because of: He was consulted about the problem by reason of his long experience.

in / within reason, in accord with reason; justifiable; proper: She tried to keep her demands in reason.

stand to reason, to be clear, obvious, or logical: With such an upbringing it stands to reason that the child will be spoiled.

with reason, with justification; properly: The government is concerned about the latest crisis, and with reason.

Origin of reason

First recorded in 1175–1225; Middle English resoun, reisun (noun), from Old French reisun, reson, from Latin ratiōn- (stem of ratiō ) ratio

synonym study for reason

1. Reason, cause, motive are terms for a circumstance (or circumstances) which brings about or explains certain results. A reason is an explanation of a situation or circumstance which made certain results seem possible or appropriate: The reason for the robbery was the victim's display of his money. The cause is the way in which the circumstances produce the effect, that is, make a specific action seem necessary or desirable: The cause was the robber's extreme need of money. A motive is the hope, desire, or other force which starts the action (or an action) in an attempt to produce specific results: The motive was to get money to buy food for his family.

usage note for reason

The construction reason is because is criticized in a number of usage guides: The reason for the long delays was because the costs greatly exceeded the original estimates. One objection to this construction is based on its redundancy: the word because (literally, by cause ) contains within it the meaning of reason; thus saying the reason is because is like saying “The cause is by cause,” which would never be said. A second objection is based on the claim that because can introduce only adverbial clauses and that reason is requires completion by a noun clause. Critics would substitute that for because in the offending construction: The reason for the long delays in completing the project was that the costs. … Although the objections described here are frequently raised, reason is because is still common in almost all levels of speech and occurs often in edited writing as well.
A similar charge of redundancy is made against the reason why, which is also a well-established idiom: The reason why the bill failed to pass was the defection of three key senators.

OTHER WORDS FROM reason

rea·son·er, nounnon·rea·son, nounnon·rea·son·er, nounoutreason, verb (used with object)

sub·rea·son, noun

Words nearby reason

rearrange, rear sight, rearview mirror, rearward, Rea Silvia, reason, reasonable, Reason, Age of, reasoned, reasoning, reasonless

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use reason in a sentence

We have reason to believe these kinds of viruses spread better when it’s cold.
The new Covid-19 case surge in Europe, explained|Julia Belluz|September 17, 2020|Vox
Today, Feynman’s “dippy process” has become as ubiquitous in physics as calculus, and its mechanics reveal the reasons for some of the discipline’s greatest successes and its current challenges.
How Mathematical ‘Hocus-Pocus’ Saved Particle Physics|Charlie Wood|September 17, 2020|Quanta Magazine
There are a number of reasons why a particular virus might be more active during certain times of year.
COVID-19 may one day come and go like the flu, but we’re not there yet|Kate Baggaley|September 16, 2020|Popular-Science
Comparing these results with 2016 exit polling is tricky for a few reasons.
The key shifts in Minnesota and Wisconsin that have improved Biden’s chances of victory|Philip Bump|September 16, 2020|Washington Post

One of the reasons for this behavior is that consumers who would ordinarily visit stores are buying online to avoid potential exposure to the virus.
Google boosting visibility of ‘nearby’ product inventory with new Shopping features|Greg Sterling|September 16, 2020|Search Engine Land
When twelve people are killed by violence, whoever they are, for whatever reason, that is a tragedy and a waste.
Trolls and Martyrdom: Je Ne Suis Pas Charlie|Arthur Chu|January 9, 2015|DAILY BEAST
The research literature, too, asks these questions, and not without reason.
How Skinny Is Too Skinny? Israel Bans ‘Underweight’ Models|Carrie Arnold|January 8, 2015|DAILY BEAST
The reason we were liberals is we were against oppression.
Bill Maher: Hundreds of Millions of Muslims Support Attack on ‘Charlie Hebdo’|Lloyd Grove|January 8, 2015|DAILY BEAST
There is a larger reason, beyond the airlines themselves, why Lion Air and 61 other Indonesian airlines are on this black list.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST
Yet, for god knows what reason, his name is never brought up in the “Great American Filmmaker” conversation.
Oscars 2015: The Daily Beast’s Picks, From Scarlett Johansson to ‘Boyhood’|Marlow Stern|January 6, 2015|DAILY BEAST
To Americans Mrs. Wright is interesting by reason of her patriotism, which amounted to a passion.
Women in the fine arts, from the Seventh Century B.C. to the Twentieth Century A.D.|Clara Erskine Clement
Wordsworth has illustrated how an unwise and importunate demand for a reason from a child may drive him into invention.
Children's Ways|James Sully
And she fell to scolding him in the way he usually loved,—but at the moment found less stimulating for some reason.
The Wave|Algernon Blackwood
The reason we associate rhythm with the significance of time is that rhythm is a measurer of time.
Expressive Voice Culture|Jessie Eldridge Southwick
That she had her definite reason he knew, as a woman knows when another woman is wearing a last year's gown.
Bella Donna|Robert Hichens

British Dictionary definitions for reason

reason

/ (ˈriːzən) /

noun

the faculty of rational argument, deduction, judgment, etc

sound mind; sanity

a cause or motive, as for a belief, action, etc

an argument in favour of or a justification for something

philosophy the intellect regarded as a source of knowledge, as contrasted with experience

logic grounds for a belief; a premise of an argument supporting that belief

by reason of because of

in reason or within reason within moderate or justifiable bounds

it stands to reason it is logical or obviousit stands to reason that he will lose

listen to reason to be persuaded peaceably

reasons of State political justifications for an immoral act

verb

(when tr, takes a clause as object) to think logically or draw (logical conclusions) from facts or premises

(intr usually foll by with) to urge or seek to persuade by reasoning

(tr often foll by out) to work out or resolve (a problem) by reasoning

Derived forms of reason

reasoner, noun

Word Origin for reason

C13: from Old French reisun, from Latin ratiō reckoning, from rērī to think

usage for reason

The expression the reason is because… should be avoided. Instead one should say either this is because… or the reason is that…

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Idioms and Phrases with reason

reason

see by reason of; in reason; it stands to reason; listen to reason; lose one's mind (reason); rhyme or reason; see reason; stand to reason; with reason.

reason

OTHER WORDS FOR reason

Idioms about reason

Origin of reason

synonym study for reason

usage note for reason

OTHER WORDS FROM reason

Words nearby reason

Words related to reason

How to use reason in a sentence

British Dictionary definitions for reason

Derived forms of reason

Word Origin for reason

usage for reason

Other Idioms and Phrases with reason