The coach's lockout strategy effectively stopped the opponents from breaking through the defense line.

lockout 是由动词短语 lock out 合成的名词，lock 意思是"锁住"，out 表示"在外面"。lockout 字面意思是"把...锁在外面"，引申为"封锁、阻止进入"的策略或行动。在体育比赛中指通过严密防守阻止对手突破的战术。