noun
a an opening that allows air, gas, or liquid to pass out of or into a confined space
verb
to give expression or utterance to
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The engineer designed a new vent system for the building to improve air circulation.
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I need to open a vent in here, it's getting stuffy.
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Let's vent about our annoying boss over lunch.
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Sometimes it's good to vent out your frustrations instead of keeping them bottled up.