n.[C]

1. （刀、剑等的）鞘；（工具等的）护套
   He wiped the knife and put it back in the sheath.

   他擦干净刀子，放入鞘内。

2. 【植】叶鞘
3. （甲壳虫等的）鞘
4. 避孕套
5. 女子紧身服装

n.

1. a cover for the blade of a knife or sword.
2. a structure in living tissue which closely envelops another.
3. a protective covering around an electric cable.
4. chiefly Brit. a condom.
5. (also sheath dress) a close-fitting dress.