1.C （气体、液体等进出的）孔、口　opening that allows air, gas, liquid, etc. to pass out of or into a confined space
2.C （鸟、鱼、爬行动物或小哺乳动物的）肛门　anus of a bird, fish, reptile or small mammal
2.C （大衣等的）衩口，开衩，背衩　a long thin opening at the bottom of the back or side of a coat or jacket

　Most office buildings have dozens of air ducts and vents.　多数办公楼都有许多的管道和通风口。
　The midi is long and straight with two side vents.　这是一条直筒长旗袍裙，两边开衩。

 ♣ give vent to
发泄（怒气等）;吐露（感情等） express a feeling, especially anger, strongly
　Then he had a good chance to give vent to his sentiment.　他可有机会发泄他的情绪了。

［派生词］ ventless adj.无孔的；无出口的