1 [T] to take weapons away from sb 缴械；解除武装: The police caught and disarmed the terrorists. 警方捉拿到了恐怖分子，并解除了他们的武装。

2 [I] (used about a country) to reduce the number of weapons it has （指国家）裁减军备，裁军

3 [T] to make sb feel less angry 使息怒；缓和怒气: Jenny could always disarm the teachers with a smile. 珍妮总能以一笑消释老师的怒气。