noun
middle guard; halfback; center forward
Used in sports contexts for a player positioned in the middle of the formation. The exact English equivalent depends on the sport: 'middle guard' in general, 'halfback' in football/soccer, 'center forward' in volleyball. The term is not common in everyday conversation outside sports.
彼はサッカー部で中衛を務めている。
He plays as a halfback on the soccer team.
バレーボールでは中衛が攻撃の中心になることが多い。
In volleyball, the center forward often becomes the focus of the attack.