definition of
[extinct]

[1] #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] #2 extinct a. (of e.g. volcanos) permanently inactive; "an extinct volcano". wn

[3] #3 extinct s. [out] being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out". wn