/ik stingkt"/ , adj.
1. no longer in existence; that has ended or died out: an extinct species of fish.
2. no longer in use; obsolete: an extinct custom.
3. extinguished; quenched; not burning.
4. having ceased eruption; no longer active: an extinct volcano.
[ 1400-50; late ME ex ( s ) tinctus put out, quenched, ptp. of ex ( s ) tinguere to EXTINGUISH ]
Syn. 1. defunct, gone, vanished. See dead. 2. archaic. 3. out.