Definition of be off
- I must be off if I want to make the next bus.
- And the runners are off.
: from a place or position
: at a distance in space or time
: from a course : aside
used as a function word to indicate physical separation or distance from a position of rest, attachment, or union
: to seaward of
: from the possession or charge of
: more removed or distant
: to go away : depart
: kill, murder
: competition : contest
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