What is Wander?
Wander is (verb) 1. to walk around without any particular aim They wandered round the town in the rain. to wander away, to wander off to walk away from where you should be Two of the party wandered off into the market. 2. to stop thinking about the current problem and think about something else Sorry – my mind was wandering, thinking about the garden. he is old and his mind is wandering he no longer thinks clearly
source: Easier English, Student Dictionary Upper Intermediate Level