ˈmjuːtənt ˈmjuʔn̩(t) ˈmjuːtənt ˈmjuʔn̩(t) mjuˈteɪʃən spɔɹt spɔːt ˌvɛəɹɪˈeɪʃn̩ ˌvɛəɹiˈeɪʃn̩ an animal that has undergone mutation tending to undergo or resulting from mutation a mutant gene (biology) an organism that has characteristics resulting from chromosomal alteration