extinct

adjectives

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"
extinct, nonextant
antonym
extant
(of e.g. volcanos) permanently inactive
"an extinct volcano"
extinct
antonym
active
is similar to
physically inactive
"Crater Lake is in the crater of a dead volcano of the Cascade Range"
dead
is an attribute of
no longer active; extinguished
"the extinction of the volcano"
extinction
being out or having grown cold
"threw his extinct cigarette into the stream"; "the fire is out"
extinct, out