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[myoot-nt] /ˈmyut nt/
undergoing or resulting from mutation.
a new type of organism produced as the result of mutation.
Origin of mutant
1900-05; < Latin mūtant- (stem of mūtāns), present participle of mūtāre to change; see -ant
Related forms
unmutant, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for mutant
Contemporary Examples
Historical Examples
  • He realized that he was in the mutant Quarter, not far from Myla's house.

    The Status Civilization Robert Sheckley
  • That should be enough to tell you about the modern Pasteur and his mutant virus.

    Pandemic Jesse Franklin Bone
  • Any tribe led by Deklay would be hostile to the mutant animals.

    The Defiant Agents Andre Alice Norton
  • They were a mutant breed, gigantic in physical stature, peaceful in nature.

    Captives of the Flame Samuel R. Delany
  • Or the Solar System would be peopled by mutant monstrosities.

    The Impossible Voyage Home Floyd L. Wallace
British Dictionary definitions for mutant


Also called mutation. an animal, organism, or gene that has undergone mutation
of, relating to, undergoing, or resulting from change or mutation
Word Origin
C20: from Latin mutāre to change
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for mutant

1901, in the biological sense, from Latin mutantem (nominative mutans) "changing," present participle of mutare "to change" (see mutable). In the science fiction sense, it is attested from 1954. As an adjective from 1903.

Online Etymology Dictionary, © 2010 Douglas Harper
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mutant in Medicine

mutant mu·tant (myōōt'nt)
An organism possessing one or more genes that have undergone mutation. adj.
Resulting from or undergoing mutation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for mutant



A weird and disgusting person; shpos: Marvin is a mutant; he's constantly licking his nose in public (1980s+ Student)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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