Overview of noun daydreaming
The noun daydreaming has 1 sense
Overview of verb daydream
The verb daydream has 2 senses
                                                       
- dream, daydream, woolgather, stargaze -- (have a daydream; indulge in a fantasy)
- daydream, moon -- (have dreamlike musings or fantasies while awake; "She looked out the window, daydreaming")