1.a hole for the escape of gas or air
2.external opening of urinary or genital system of a lower vertebrate
3.a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
4.a slit in a garment (as in the back seam of a jacket)
5.activity that releases or expresses creative energy or emotion;
she had no other outlet for her feelings
1.give expression or utterance to;
She vented her anger
2.expose to cool or cold air so as to cool or freshen;
air the old winter clothes