形容詞 extinct:

1. no longer in existence; lost or especially having died out leaving no living representatives
   同義詞：nonextant
2. (of e.g. volcanos) permanently inactive
3. being out or having grown cold
   同義詞：out

1. A genus of extinct, large, flightless birds native to Madagascar.
   象鳥，隆鳥一種不會(huì)飛的巨鳥，產(chǎn)于馬達(dá)加斯加島，現(xiàn)已絕種
2. An extinct volcano.
   一座死火山
3. Dinosaurs have been extinct for millions of years.
   恐龍已絕種幾百萬(wàn)年了。

ex.tinct

adj.Abbr. ext.（形容詞）縮寫 ext.
No longer existing or living:
滅絕的：不再存在的或不再活的：
例句：
an extinct species.
一個(gè)滅絕的種

No longer burning or active:
熄滅的：不再燃燒的，不再活躍的：
例句：
an extinct volcano.
一座死火山

No longer in use:
廢除了的：
例句：
an extinct custom.See Synonyms at dead
廢除了的習(xí)俗參見 dead

Law Lacking a claimant; void:
【法律】 過(guò)時(shí)的；失效的：
例句：
an extinct title.
一個(gè)失效的頭銜

來(lái)源：
Middle English
中古英語(yǔ)
from Latin exstonctus [past participle of] exstinguere [to extinguish] * see extinguish
源自 拉丁語(yǔ) exstonctus [] exstinguere的過(guò)去分詞 [滅絕] *參見 extinguish