Synonyms of extinct

Adjective

1. extinct (vs. extant), nonextant, dead, nonexistent

usage: no longer in existence; lost or especially having died out leaving no living representatives; "an extinct species of fish"; "an extinct royal family"; "extinct laws and customs"

2. extinct (vs. active), dead

usage: (of e.g. volcanos) permanently inactive; "an extinct volcano"

3. extinct, out(predicate), dead (vs. live)

usage: being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out"

Definition and meaning of extinct (Dictionary)