WALK [I, T] › to walk slowly about a place without any purpose: They wandered aimlessly around the town. LEAVE PLACE [I] (also wander off) › to walk away from the place where you should be: He was here a moment ago - he must have wandered off. sb's attention/mind/thoughts, etc wander › If someone's attention/mind, etc wanders, they start thinking about one subject when they should be thinking about a different subject: I was bored and my thoughts started to wander.