Webster's English Dictionary

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extinct

1. ex.tinct \ik-'stin(k)t, 'ek-.\ aj [ME, fr. L exstinctus, pp. of 
   exstinguere] 1a: no longer burning  1b: no longer active {an ~ volcano}  2: 
   no longer existing {an ~ animal}  3a: gone out of use : SUPERSEDED  3b: 
   having no qualified claimant {an ~ title} 
2. extinct vt archaic  : EXTINGUISH