Etymology
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mutation (n.)

late 14c., mutacioun, "action or process of changing," from Old French mutacion (13c.), and directly from Latin mutationem (nominative mutatio) "a changing, alteration, a turn for the worse," noun of action from past-participle stem of mutare "to change" (from PIE root *mei- (1) "to change, go, move"). The genetics sense "process whereby heritable changes in DNA arise" is from 1894. The linguist's i-mutation is attested from 1874; earlier was i-umlaut (1869), from German, for which mutation was Sweet's English substitute.

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Definitions of mutation

mutation (n.)
(biology) an organism that has characteristics resulting from chromosomal alteration;
Synonyms: mutant / variation / sport
mutation (n.)
(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism;
Synonyms: genetic mutation / chromosomal mutation
mutation (n.)
a change or alteration in form or qualities;
From wordnet.princeton.edu