1 [I,T] to walk somewhere slowly with no particular sense of direction or purpose 漫游；闲逛；游荡: We spent a pleasant day wandering around the town. 我们在镇里愉快地闲逛了一天。He was found in a confused state, wandering the streets. 有人看见他神志不清地在街上游荡。

2 [I] wander (away/off) (from sb/sth) to walk away from a place where you ought to be or the people you were with 离开原处；走失: We must stay together while visiting the town so I don't want anybody to wander off. 我们在城里游览时必须一起行动，我不希望任何人走失。Don't wander away from the main road. 不要偏离大路。

3 [I] (used about sb's mind, thoughts, etc) to stop paying attention to sth; to be unable to stay on one subject （指人的精神、思想等）精神恍惚；思想不集中: The lecture was so boring that my attention began to wander. 那节课太枯燥了，我开始走神。