WordWeb Online

1. Half asleep
   "made drowsy by the long ride"; "it seemed a pity to disturb the drowsy professor";
   - drowsing, dozy, dopey, dopy
    
2. Showing lack of attention or boredom
   "the drowsy congregation";
   - oscitant, yawning, dopey, dopy

Derived forms: drowsier, drowsiest

See also: asleep, inattentive, sleeping, unattentive [rare]

Encyclopedia: Drowsy