What is the meaning of off?

verb

• Kill intentionally and with premeditation.
  • usage: "The mafia boss ordered his enemies murdered"
  • synonyms: murder, slay, hit, dispatch, bump off, polish off, remove

adjective

• Not in operation or operational.
  • usage: "the oven is off"; "the lights are off"
• Below a satisfactory level.
  • usage: "an off year for tennis"; "his performance was off"
• Of events. ( no longer planned or scheduled)
  • usage: "the wedding is definitely off"
  • synonyms: cancelled
• In an unpalatable state.
  • usage: "sour milk"
  • synonyms: sour, turned
• Not performing or scheduled for duties.
  • usage: "He's off every Tuesday"

adverb

• From a particular thing or place or position (`forth' is obsolete. )
  • usage: "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"
  • synonyms: away, forth
• At a distance in space or time)
  • usage: "the boat was 5 miles off (or away)"; "the party is still 2 weeks off (or away. "; "away back in the 18th century"
  • synonyms: away
• No longer on or in contact or attached.
  • usage: "clean off the dirt"; "he shaved off his mustache"