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 formsun·mu·tant, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for mutant

freak, deviation, abnormality, deformity, monster

Examples from the Web for mutant

Contemporary Examples of mutant

Historical Examples of mutant

  • He realized that he was in the Mutant Quarter, not far from Myla's house.

  • That should be enough to tell you about the modern Pasteur and his mutant virus.


    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.

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 for mutant

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

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

mutant in Medicine




An organism possessing one or more genes that have undergone mutation.


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.