Vent meaning : An opening through which gases, especially air, can pass. A small aperture. The opening of a volcano from which lava flows. A verbalized frustration. The excretory opening of lower orders of vertebrates. A slit in the seam of a garment. The opening at the breech of a firearm, through which fire is communicated to the powder of the charge; touchhole. In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet. Opportunity of escape or passage from confinement or privacy; outlet. Emission; escape; passage to notice or expression; publication; utterance. To allow gases to escape. To allow to escape through a vent. To express a strong emotion. To snuff; to breathe or puff out; to snort.