busy in WordNet English dictionary

1. keep busy with
   "She busies herself with her butterfly collection"
   busy  occupy 
   

1. actively or fully engaged or occupied
   "busy with her work"; "a busy man"; "too busy to eat lunch"
   busy 
   
2. overcrowded or cluttered with detail
   "a busy painting"; "a fussy design"
   busy  fussy 
   
3. intrusive in a meddling or offensive manner
   "an interfering old woman"; "bustling about self-importantly making an officious nuisance of himself"; "busy about other people's business"
   interfering  meddlesome  meddling  officious  busy  busybodied 
   
4. (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)
   "her line is busy"; "receptionists' telephones are always engaged"; "the lavatory is in use"; "kept getting a busy signal"
   busy  engaged  in use 
   
5. crowded with or characterized by much activity
   "a very busy week"; "a busy life"; "a busy street"; "a busy seaport"
   busy