Definition of reasonnext
1
as in explanation
a statement given to explain a belief or act she gave a good reason for her seemingly suspicious behavior

Synonyms & Similar Words

Relevance
2
as in motive
something (as a belief) that serves as the basis for another thing a firm belief that we are here on earth to help others is the reason for her tireless volunteer work

Synonyms & Similar Words

3
4
5
6
7

reason

2 of 2

verb

1
as in to understand
to form an opinion or reach a conclusion through reasoning and information she reasoned that since all of the cakes were on sale for the same price, she might as well pick the biggest one

Synonyms & Similar Words

2

Synonym Chooser

How is the word reason different from other verbs like it?

Some common synonyms of reason are cogitate, deliberate, reflect, speculate, and think. While all these words mean "to use one's powers of conception, judgment, or inference," reason stresses consecutive logical thinking.

able to reason brilliantly in debate

When is it sensible to use cogitate instead of reason?

The meanings of cogitate and reason largely overlap; however, cogitate implies deep or intent thinking.

cogitated on the mysteries of nature

Where would deliberate be a reasonable alternative to reason?

The synonyms deliberate and reason are sometimes interchangeable, but deliberate suggests slow or careful reasoning before forming an opinion or reaching a conclusion or decision.

the jury deliberated for five hours

When is reflect a more appropriate choice than reason?

The words reflect and reason can be used in similar contexts, but reflect suggests unhurried consideration of something recalled to the mind.

reflecting on fifty years of married life

When can speculate be used instead of reason?

The words speculate and reason are synonyms, but do differ in nuance. Specifically, speculate implies reasoning about things theoretical or problematic.

speculated on the fate of the lost explorers

When would think be a good substitute for reason?

Although the words think and reason have much in common, think is general and may apply to any mental activity, but used alone often suggests attainment of clear ideas or conclusions.

teaches students how to think

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of reason
Noun
The exact reason for the planet's unusual tilt has long perplexed astronomers, and debate continues over what might have led to its present-day appearance. — Micah Hanks, Space.com, 28 Sep. 2026 With Venus and Mercury both going retrograde in your 8th house, there’s reason to suspect that you’ll be visited by a lot of ghosts over these next few weeks. — Steph Koyfman, Condé Nast Traveler, 28 Sep. 2026
Verb
This summer an OpenAI test model broke out of its sandbox, reasoned its way into another company’s servers and stole answers to cheat on its own evaluation. — Pam McNall, AJC.com, 24 Sep. 2026 The newest generation of agentic AI systems can reason through multistep problems, execute code, use tools and navigate the internet. — Ed Fox, Forbes.com, 24 Sep. 2026 See All Example Sentences for reason
Recent Examples of Synonyms for reason
Noun
  • His doctors offer neurological explanations, but identifying a change in the insula does not settle what that change means to the person living through it.
    — Zain Khalid, Vulture, 1 Oct. 2026
  • If something goes wrong and the customer has to chase someone down for an explanation, the problem becomes bigger than the original mistake.
    — Levi King, Forbes.com, 1 Oct. 2026
Noun
  • Police have not disclosed a potential motive and said there's no information indicating Matthews was targeted ahead of time.
    — Emily Shapiro, ABC News, 28 Sep. 2026
  • Three suspicious vehicles were stopped near the base, and investigators are examining several possible motives and connections.
    — Majd Al-Waheidi, NPR, 28 Sep. 2026
Noun
  • There are larger forces at work, the stuff that hurts people who hurt people, and portraying that hurt (and its goal, escape) with understanding – not to say excuse-making – takes uncommon talent.
    — Greg Evans, Deadline, 28 Sep. 2026
  • Treat it as an excuse to wear more outspoken pieces from here on out, whether this implies bright-and-striped sweaters or fuzzy, quirky boat shoes.
    — Stacia Datskovska, Footwear News, 28 Sep. 2026
Noun
  • Investigators were looking into the cause of the crash, which was not immediately clear.
    — ABC News, ABC News, 27 Sep. 2026
  • What readers told us Thirty-six percent of readers who responded to our survey picked education as the cause that mattered most.
    — Chris Fusco, Sacbee.com, 27 Sep. 2026
Noun
  • Iran makes another push before heading home In a sign of Tehran’s apparent sense of urgency, Pezeshkian hosted the prime minister of Qatar, the mediator in the indirect talks, early Friday before much of New York rolled out of bed.
    — Cara Anna, Los Angeles Times, 26 Sep. 2026
  • In a sign of Tehran’s apparent sense of urgency, Pezeshkian hosted the prime minister of Qatar, the mediator in the indirect talks, early Friday before much of New York rolled out of bed.
    — Cara Anna, Fortune, 26 Sep. 2026
Noun
  • Approved by frequent travelers, this portable device will effectively set your mind at ease when attempting to enjoy a restful vacation away from potential threats and unknown cameras.
    — Merrell Readman, Travel + Leisure, 30 Sep. 2026
  • Related Articles After meeting Johanna Rees, vice president for programming and creative partnerships at the Hollywood Bowl, Halsey pitched an idea that had long been brewing in her mind.
    — Maximilíano Durón, ARTnews.com, 29 Sep. 2026
Noun
  • If anyone can reconstruct Apéry’s reasoning, the odd values of zeta may finally be proven irrational.
    — Lyndie Chiou, Scientific American, 2 Oct. 2026
  • Give them the economics, the reasoning beneath the numbers, and partner with organizations like Economics Arkansas, which has equipped our teachers to do exactly that since 1962.
    — Michael Poore Special to the Democrat-Gazette, Arkansas Online, 1 Oct. 2026
Verb
  • For some reason--some great reason, that only the editors on the other side of the room understand--the reporters for at least the Democrat-Gazette's story (unlike some national outlets) decided to call Skip Rutherford.
    — Arkansas Online, Arkansas Online, 1 Oct. 2026
  • Firms like Edward Jones and LPL Financial, meanwhile, are rapidly adopting AI tools to gain financial insights, but also to better understand and communicate with their customers.
    — Jeff John Roberts, Fortune, 1 Oct. 2026

Browse Nearby Words

Cite this Entry

“Reason.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/reason. Accessed 2 Oct. 2026.

More from Merriam-Webster on reason

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster