-ˈrē-zᵊn-ə-bəl How to pronounce unreasonable (audio)
: not governed by or acting according to reason
unreasonable people
: not conformable to reason : absurd
unreasonable beliefs
: exceeding the bounds of reason or moderation
working under unreasonable pressure
-ˈrē-zᵊn-ə-bəl- How to pronounce unreasonable (audio)
-ˈrē-zᵊn-ə-blē How to pronounce unreasonable (audio)

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 But the meeting proved unfruitful, with the Syrians not providing any proof-of-life information and making demands that U.S. officials deemed unreasonable. CBS News, 18 May 2024 Cancer June 21 – July 22 Your friends could seem to want an unreasonable level of control over your personal choices at the moment. Tarot.com, Baltimore Sun, 17 May 2024 Lawsuits nationwide have argued that the destruction of property in encampments violates the U.S. Constitution’s Fourth Amendment, which prohibits unreasonable seizures. Nicole Santa Cruz, ProPublica, 16 May 2024 The agency's preliminary evaluation is the first step to determine whether the vehicles pose an unreasonable risk to safety. Deborah Sophia, Detroit Free Press, 10 May 2024 See all Example Sentences for unreasonable 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unreasonable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

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

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

Dictionary Entries Near unreasonable

Cite this Entry

“Unreasonable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreasonable. Accessed 12 Jun. 2024.

Legal Definition


: not reasonable : beyond what can be accepted: as
: clearly inappropriate, excessive, or harmful in degree or kind
an unreasonable delay
an unreasonable restraint of trade
: lacking justification in fact or circumstance
an unreasonable inference
especially : irrational sense b
the agency decision was unreasonable
: 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
unreasonableness noun
unreasonably adverb

More from Merriam-Webster on unreasonable

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