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

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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

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reason

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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

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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
But then the Law & Order version of Swift reasoned that the real Swift most likely would be at home with her cats named after TV characters, one named after Benson. — Kory Grow, Rolling Stone, 15 Sep. 2026 Other scientists had reasoned that because Neornithes species lived near water, something about this habitat helped protect them from the devastating effects of the mass extinction. — Katie Hunt, CNN Money, 15 Sep. 2026 See All Example Sentences for reason
Recent Examples of Synonyms for reason
Noun
  • This business advantage offers one explanation for why prediction market startups have become so valuable.
    — Jeff John Roberts, Fortune, 24 Sep. 2026
  • On August 27 Philip Engel of the University of Illinois Chicago posted a more pedagogical explanation of the LLM’s process on his website.
    — Joseph Howlett, Scientific American, 24 Sep. 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
  • Hardly decipherable, but the syllables tugged at the corner of my mind.
    — Literary Hub, Literary Hub, 22 Sep. 2026
  • That result remains etched in the standings but is finally blurred from McVay's mind.
    — Armando Salguero OutKick, FOXNews.com, 22 Sep. 2026
Noun
  • Each has their own reasoning – some say any action AI would take that could wipe out humanity would need heavy involvement from human accomplices.
    — Clare Duffy, CNN Money, 24 Sep. 2026
  • Asked by the judge how the settlement addresses the state AGs’ concerns over competition, as outlined in its antitrust case, Blizzard said the reasoning was that the states were wary about permanently blocking the Paramount-WBD deal.
    — Todd Spangler, Variety, 24 Sep. 2026
Verb
  • Anyone who is actually a friend will understand that and respect your boundaries.
    — Literary Hub, Literary Hub, 24 Sep. 2026
  • The reality star will compete on Netflix’s Million Dollar Secret as Deadline understands that the streamer renewed it for a third season.
    — Peter White, Deadline, 23 Sep. 2026

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Cite this Entry

“Reason.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/reason. Accessed 29 Sep. 2026.

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