1. | （衬衣等里面贴身穿的）背心，汗衫a piece of underwear worn under a shirt, etc. next to the skin |
a cotton vest 棉汗衫 |
2. | 坎肩；（外面穿的）背心a special piece of clothing that covers the upper part of the body |
a bullet-proof vest 防弹背心 | |
a running vest 赛跑背心 |
3. | （西服的）背心a short piece of clothing with buttons down the front but no sleeves, usually worn over a shirt and under a jacket, often forming part of a man's suit |
