#1
extinct a. [
nonextant] 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"
. wn #2
extinct a. (of e.g. volcanos) permanently inactive; "an extinct volcano"
. wn #3
extinct s. [
out] being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out"
. wn