1.N-COUNT A vault is a secure room where money and other valuable things can be kept safely. 保险库

2.N-COUNT A vault is a room underneath a church or in a cemetery where people are buried, usually the members of a single family. 家族墓穴

3.N an arched structure that forms a roof or ceiling 拱顶; 穹隆

4.V-T/V-I If you vault something or vault over it, you jump quickly onto or over it, especially by putting a hand on top of it to help you balance while you jump. (尤指以手支撑的) 跃过; 跳跃