1. (adj)off not in operation or operational
"the oven is off"; "the lights are off"
2. (adj)off below a satisfactory level "an off year for tennis"; "his performance was off"
3. (adj)off, cancelled (of events) no longer planned or scheduled
"the wedding is definitely off"
4. (adj)off, sour, turned in an unpalatable state "sour milk"
5. (adj)off not performing or scheduled for duties
"He's off every Tuesday"
6. (verb)murder, slay, hit, dispatch, bump off, off, polish off, remove kill intentionally and with premeditation "The mafia boss ordered his enemies murdered"