n.

1. 蛇（尤指大蛇、毒蛇）[C]
2. 狡猾的人；阴险毒辣的人[C]
   a serpent that has betrayed your brother

   一个出卖了你兄弟的阴险毒辣的人

3. （常大写）魔鬼，撒旦[the S]
4. 【音】（旧时的）蛇形号，蛇形管[C]

n.

1. chiefly literary a large snake.
   ▸a dragon or other mythical snake-like reptile.
   ▸ (the Serpent) a biblical name for Satan (see Gen. 3, Rev. 20).
   ▸a sly or treacherous person.
2. historical a bass wind instrument made of leather-covered wood in three U-shaped turns, with a cup-shaped mouthpiece and few keys.