| Noun | 1. | mutant - (biology) an organism that has characteristics resulting from chromosomal alterationorganism, being - a living thing that has (or can develop) the ability to act or function independently biological science, biology - the science that studies living organisms freak, lusus naturae, monstrosity, monster - a person or animal that is markedly unusual or deformed |
| 2. | mutant - an animal that has undergone mutation | |
| Adj. | 1. | mutant - tending to undergo or resulting from mutation; "a mutant gene" |