1.
Set out on a trip, as in We plan to start off in the morning. [Early 1800s] Also see
start out.
2.
start someone off. Cause someone to set out or to begin something, as in Mother packed their lunches and started them off, or Paul started them off on their multiplication tables. [Early 1700s] For
start off on the right foot, see get off on the right foot.


