off in WordNet English dictionary

1. from a particular thing or place or position (`forth' is obsolete)
   "ran away from the lion"; "wanted to get away from there"; "sent the children away to boarding school"; "the teacher waved the children away from the dead animal"; "went off to school"; "they drove off"; "go forth and preach"
   away  off  forth  away  off  forth 
   
2. at a distance in space or time
   "the boat was 5 miles off (or away)"; "the party is still 2 weeks off (or away)"; "away back in the 18th century"
   off  away  off  away 
   
3. no longer on or in contact or attached
   "clean off the dirt"; "he shaved off his mustache"
   off  off 
   

1. kill intentionally and with premeditation
   "The mafia boss ordered his enemies murdered"
   murder  slay  hit  dispatch  bump off  off  polish off  remove 
   

1. (of events) no longer planned or scheduled
   "the wedding is definitely off"
   off  cancelled 
   
2. not in operation or operational
   "the oven is off"; "the lights are off"
   off 
   
3. not performing or scheduled for duties
   "He's off every Tuesday"
   off 
   
4. in an unpalatable state
   "sour milk"
   off  sour  turned 
   
5. below a satisfactory level
   "an off year for tennis"; "his performance was off"
   off