drift
Definitions
A continuous, slow movement or change in position, often caused by a current of water, air, or ice.
A general tendency, trend, or the underlying meaning of a situation or conversation.
A large pile of snow or sand formed by the wind.
Examples
The boat began to drift slowly away from the dock as the tide came in.
Snow started to drift against the front door during the blizzard.
It is easy to let your mind drift when you are listening to a long lecture.