1 to disappear suddenly or in a way that you cannot explain 突然不见;莫名其妙地消失:
When he turned round, the two men had vanished without trace.他转过身来,发现那两个男人已经消失无踪。
2 to stop existing 不再存在;绝迹:
This species of plant is vanishing from our countryside.这种植物在我们的郊野越来越罕见了。