un·​ac·​cept·​able | \ ˌən-ik-ˈsep-tə-bəl How to pronounce unacceptable (audio) , -ak-\

Definition of unacceptable

: not acceptable : not pleasing or welcome

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Other Words from unacceptable

unacceptability \ ˌən-​ik-​ˌsep-​tə-​ˈbi-​lə-​tē How to pronounce unacceptability (audio) \ noun
unacceptably \ ˌən-​ik-​ˈsep-​tə-​blē How to pronounce unacceptably (audio) \ adverb

Examples of unacceptable in a Sentence

a word that is unacceptable in formal English Some of her ideas were unacceptable to other people.

Recent Examples on the Web

During the course of this investigation, some issues were discovered that are completely unacceptable for this community. Melanie Burney, Philly.com, "Beyond boys' lacrosse, on Haddonfield sports teams, racial slurs 'just happened all the time,' parents say," 18 May 2018 But the growing militarization of space made these delays unacceptable to military commanders. Joe Pappalardo, Popular Mechanics, "USAF's Next-Gen GPS Satellites Will Be a Huge Upgrade...Eventually," 26 Dec. 2018 That would have left his teammates and his manager to explain his unacceptable actions. Marcus Hayes, Philly.com, "Rhys Hoskins regrets confrontation with fan | Marcus Hayes," 25 June 2018 The one exception is debt to family and friends, which women find more unacceptable by over three percentage points. Special To Cleveland.com, cleveland.com, "How much debt repels daters? - New survey shows average amounts that turn off suitors," 14 May 2018 Mom was right: Showing up empty-handed to Thanksgiving dinner is entirely unacceptable. Jenna Rennert, Vogue, "The 11 Best Beauty Gifts for Your Thanksgiving Host," 20 Nov. 2018 Today, the United States Supreme Court sent a clear message: that the demonization of religious beliefs, especially in policymaking, is constitutionally unacceptable. Jewish Journal, "Jewish groups react to Supreme Court religious-liberty case," 5 June 2018 British lawmakers repudiated the deal Mrs. May crafted with her EU counterparts by a vote of 432 to 202 after months of complaints that the agreement was unacceptable. Jason Douglas, WSJ, "U.K. Parliament Repudiates Theresa May’s Brexit Plan," 15 Jan. 2019 Photo: Reuters After months of complaints that the deal is unacceptable, British lawmakers are likely to show their displeasure by voting against it in record numbers. Max Colchester, WSJ, "Brexit Deal Hangs in Balance as May Braces for Defeat in Crucial Vote," 15 Jan. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unacceptable.' 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 unacceptable

15th century, in the meaning defined above

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Last Updated

18 Mar 2019

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Time Traveler for unacceptable

The first known use of unacceptable was in the 15th century

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More Definitions for unacceptable



English Language Learners Definition of unacceptable

: not pleasing or welcome : not acceptable


un·​ac·​cept·​able | \ ˌən-ik-ˈsep-tə-bəl How to pronounce unacceptable (audio) , -ak-\

Kids Definition of unacceptable

: not pleasing or welcome : not acceptable unacceptable behavior

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Comments on unacceptable

What made you want to look up unacceptable? Please tell us where you read or heard it (including the quote, if possible).


to reflect, repel, echo, or resound

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