|1.||[ adjective ] 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"
|Related terms:||extant dead nonexistent|
|2.||[ adjective ] no longer existing or inaccessible through loss or destruction|
"its nonextant original was written on vellum"- G.B.Saul