adj. 1 (of a family, class, or species) that has died out. 2 a (of fire etc.) no longer burning. b (of a volcano) that no longer erupts. 3 (of life, hope, etc.) terminated, quenched. 4 (of an office etc.) obsolete. 5 (of a title of nobility) having no qualified claimant.
[ ME f. L exstinguere exstinct- (as EX-(1), stinguere quench) ]