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。