noun
rearguard; rear guard
Military term for the unit protecting the rear of a formation. Often contrasted with 前衛 (vanguard).
See also: 前衛
後衛部隊が敵の追撃を防いだ。
The rearguard unit held off the enemy's pursuit.
Sports term for a player positioned in the back line, such as in soccer, rugby, or basketball.
彼はサッカー部で後衛を務めている。
He plays as a defender on the soccer team.