un·​rea·​son·​able | \ ˌən-ˈrēz-nə-bəl, -ˈrē-zᵊn-ə-bəl How to pronounce unreasonable (audio) \

Definition of unreasonable

1a : not governed by or acting according to reason unreasonable people
b : not conformable to reason : absurd unreasonable beliefs
2 : exceeding the bounds of reason or moderation working under unreasonable pressure

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Other Words from unreasonable

unreasonableness \ ˌən-​ˈrēz-​nə-​bəl-​nəs , -​ˈrē-​zᵊn-​ə-​bəl-​ How to pronounce unreasonable (audio) \ noun
unreasonably \ ˌən-​ˈrēz-​nə-​blē , -​ˈrē-​zᵊn-​ə-​blē How to pronounce unreasonable (audio) \ adverb

Examples of unreasonable in a Sentence

I told him that I wouldn't pay unless he sent me a replacement. Am I being unreasonable? You are entitled to compensation for unreasonable delays.
Recent Examples on the Web On Monday, the prosecution's use-of-force expert testified that Chauvin's actions represented deadly force and were unreasonable. Melissa Macaya, CNN, "Derek Chauvin is on trial for George Floyd's death," 14 Apr. 2021 Hennepin County District Judge Peter Cahill denied the motion for a judgement of acquittal Wednesday morning, saying the jury could give its greatest weight to the witnesses who established that the use of force was unreasonable. NBC News, "Derek Chauvin trial: Live updates on George Floyd's death," 13 Apr. 2021 If Rondo has reached that level at this point, then Hall of Fame conversation is not unreasonable. BostonGlobe.com, "Is Rajon Rondo a Hall of Famer? It’s a great question," 10 Apr. 2021 It’s not unreasonable to think a fan would buy a product like that in the hopes of looking like a Kardashian. Emily Tannenbaum, Glamour, "The Khloé Kardashian Bikini-Pic Controversy Just Keeps Getting Messier," 8 Apr. 2021 In theory, two non-day-care activities did not seem unreasonable. New York Times, "Sports Meant So Much to Me. Why Wouldn’t My Son Play?," 16 Mar. 2021 However, this drop is unreasonable as TAL has a much bigger online presence compared to offline. Brendan Ahern, Forbes, "JD.com Powers Through Q4, China Stocks Rebound," 11 Mar. 2021 But experts and advocates say it’s unreasonable to expect domestic violence victims to present their evidence perfectly during a terrifying situation. Ann Givens, Detroit Free Press, "'He killed my baby': Michigan woman 'did everything right' to protect herself from ex," 26 Jan. 2021 It’s not unreasonable to expect a party who wishes to shield that information from the public to come up with some justification. Jack Greiner, The Enquirer, "Strictly Legal: Public school can’t seal sexual harassment suit," 3 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unreasonable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unreasonable

14th century, in the meaning defined at sense 1a

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Time Traveler for unreasonable

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The first known use of unreasonable was in the 14th century

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Last Updated

16 Apr 2021

Cite this Entry

“Unreasonable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreasonable. Accessed 22 Apr. 2021.

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English Language Learners Definition of unreasonable

: not fair, sensible, or appropriate : not reasonable


un·​rea·​son·​able | \ ˌən-ˈrē-zᵊn-ə-bəl How to pronounce unreasonable (audio) \

Kids Definition of unreasonable

: not fair, sensible, appropriate, or moderate an unreasonable schedule unreasonable behavior an unreasonable fear

Other Words from unreasonable

unreasonably \ -​blē \ adverb



Legal Definition of unreasonable

: not reasonable : beyond what can be accepted: as
a : clearly inappropriate, excessive, or harmful in degree or kind an unreasonable delay an unreasonable restraint of trade
b : lacking justification in fact or circumstance an unreasonable inference especially : irrational sense b the agency decision was unreasonable
c : not supported by a warrant or by a valid exception to a warrant requirement (as when there is reasonable suspicion) and therefore unconstitutional the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violatedU.S. Constitution amend. IV — see also search, seizure

Other Words from unreasonable

unreasonableness noun
unreasonably adverb

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