extinct/IkˋstIŋkt; IkˈstIŋkt/adj 1 a type of animal or plant that is extinct no longer exists〔某种动物或植物〕灭绝的﹐绝种的: Activists fear that the tiger may become extinct . 活动家们担心老虎可能会灭绝。2 an extinct VOLCANO does not ERUPT (=send out hot rock, smoke etc)〔火山〕不再活跃的﹐死的