off off /ˈɔf/

adjective

1. () Not in operation or operational  ( off )
   not in operation or operational
    The oven is off
   the oven is off
    The lights are off
   the lights are off
   
2. () Below a satisfactory level  ( off )
   below a satisfactory level
    An off year for tennis
   an off year for tennis
    His performance was off
   his performance was off
   
3. Not performing or scheduled for duties  ( off )
   not performing or scheduled for duties
    He's off every Tuesday
   He's off every Tuesday
   
4. (of events) no longer planned or scheduled  ( cancelled [Canadian, British] , off , canceled [American] )
   (of events) no longer planned or scheduled
    The wedding is definitely off
   the wedding is definitely off
   
5. In an unpalatable state  ( off , sour , turned )
   in an unpalatable state
    Sour milk
   sour milk
   

adverb

1. () From a particular thing or place or position (forth' is obsolete)  ( forth , off , away )
   from a particular thing or place or position (forth' is obsolete)
    Ran away from the lion
   ran away from the lion
    Wanted to get away from there
   wanted to get away from there
    Sent the children away to boarding school
   sent the children away to boarding school
    The teacher waved the children away from the dead animal
   the teacher waved the children away from the dead animal
    Went off to school
   went off to school
    They drove off
   they drove off
    Go forth and preach
   go forth and preach
   
2. () At a distance in space or time  ( away , off )
   at a distance in space or time
    The boat was 5 miles off (or away)
   the boat was 5 miles off (or away)
    The party is still 2 weeks off (or away)
   the party is still 2 weeks off (or away)
    Away back in the 18th century
   away back in the 18th century
   
3. () No longer on or in contact or attached  ( off )
   no longer on or in contact or attached
    Clean off the dirt
   clean off the dirt
    He shaved off his mustache
   he shaved off his mustache
   

verb

1. [Informal, N. American] Kill intentionally and with premeditation  ( dispatch , hit , off [Informal, N. American] , bump off [Informal] , murder , polish off [Informal] , remove , slay )
   kill intentionally and with premeditation
    The mafia boss ordered his enemies murdered
   The mafia boss ordered his enemies murdered