mu·​ta·​ble | \ˈmyü-tə-bəl \

Definition of mutable 

1 : prone to change : inconstant mutable opinions

2a : capable of change or of being changed mutable laws

b : capable of or liable to mutation mutable vowels a mutable gene

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Other Words from mutable

mutability \ˌmyü-​tə-​ˈbi-​lə-​tē \ noun
mutably \ˈmyü-​tə-​blē \ adverb

Examples of mutable in a Sentence

the government's mutable economic policies a politician with very mutable positions on all the issues

Recent Examples on the Web

Each season concludes with a mutable sign — Gemini, Virgo, Sagittarius, or Pisces — that possesses effortless fluidity well-suited to change and transformation. Aliza Kelly Faragher, Allure, "Each Zodiac Sign's Unique Personality Traits, Explained by an Astrologer," 28 Oct. 2018 That’s partly because the play’s performers, under Mr. Mendes’s impeccably paced direction, are so inventively mutable. Ben Brantley, New York Times, "Review: ‘The Lehman Trilogy’ Is a Transfixing Epic of Riches and Ruin," 13 July 2018 Sophia Simensky’s set and costumes are as basic as can be, yet surprisingly mutable, too, especially as enhanced by Seth Rook Williams’s carefully shaded lighting and Daniel Foxsmith’s ominous sound design. Ben Brantley, New York Times, "Review: In ‘Operation Crucible,’ Terror and Reassurance," 15 May 2018 And indeed, 40 years is a long trend for something as perennially mutable, and undefinable, as pop music. Dj Louie Xiv, Vanities, "Has 2018 Killed the Pop Star?," 22 June 2018 The drawing of lines for electoral districts must build community across partisan divides rather than divide people by mutable political identities. The Christian Science Monitor, "The high court’s hint on partisan gerrymandering," 18 June 2018 But apart from this mutable version of time, Einstein also calculated the speed of light. Matt Blitz, Popular Mechanics, "We Already Know How To Build a Time Machine," 28 May 2018 The second is more interesting (though less mutable). John Patty, Vox, "What the farm bill’s failure says about congressional function," 21 May 2018 Memories are mutable and among illiterates lead to flexible behavior. Reuven Brenner, WSJ, "The Roots of Anti-Semitism," 10 May 2018

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

14th century, in the meaning defined at sense 1

History and Etymology for mutable

Middle English, from Latin mutabilis, from mutare to change; akin to Old English mīthan to conceal, Sanskrit mināti he exchanges, deceives

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Last Updated

8 Dec 2018

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Time Traveler for mutable

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

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English Language Learners Definition of mutable

: able or likely to change often


mu·​ta·​ble | \ˈmyüt-ə-bəl \

Medical Definition of mutable 

1 : capable of change or of being changed in form, quality, or nature

2 : capable of or liable to mutation

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