1. Absentminded dreaming while awake
   "His frequent daydreaming made it difficult for him to focus on his work";
   - reverie, revery, daydream, oneirism
    
2. An idle indulgence in fantasy
   "Her daydreaming during the meeting didn't go unnoticed";
   - woolgathering

1. Engage in aimless daydreaming or idle thinking
   "He often daydreams during boring meetings";
   - dream, woolgather, stargaze
    
2. Have dreamlike musings or fantasies while awake
   "She looked out the window, daydreaming";
   - moon

See also: think of

Type of: conceive of, dream, dreaming, envisage, ideate [informal], idle, imagine, laze, slug [informal]

Encyclopedia: Daydreaming