Bear Off Definition

verb
To gain; to carry off, as a prize.
Wiktionary
To restrain; to keep from approaching.
Wiktionary
To remove to a distance; to keep clear from rubbing against anything.
To bear off a blow; to bear off a boat.
Wiktionary

To remove one of one's own checkers from the board. The first player to bear off all checkers is the winner.

Wiktionary