n.[C]

1. 武器，兵器；凶器
   They were testing a new weapon then.

   当时他们在试验一件新武器。

2. 赖以防卫或战胜他人的方式
   Logic is her weapon.

   逻辑是她的利器。

   Complete anonymity is the best weapon I have.

   彻底隐姓埋名是我最好的武器。

n.

1. a thing designed or used for inflicting bodily harm or physical damage.
2. a means of gaining an advantage or defending oneself.