vent

An opening through which gases, especially air, can pass.

the vent of a cask; the vent of a mould

According to geologists who work in the area, the vents at Castello Aragonese have been spewing carbon dioxide for at least several hundred years, maybe longer.

A small aperture.

Look, how thy wounds do bleed at many vents.

There, at one Paſſage, oft you might ſurvey / A Lye and Truth contending for the vvay; / And long 'tvvas doubtful, both ſo cloſely pent, / VVhich firſt ſhould iſſue thro the narrovv Vent: […]

An opening in a volcano from which lava or gas flows.

A rant; a long session of expressing verbal frustration.

The excretory opening of lower orders of vertebrates; cloaca.

To allow gases to escape.

The stove vents to the outside.

To allow gases to escape from (a sealed space, container, etc.).

In the engine room, the changing angle dropped the melted core to the deck. The hot mass attacked the steel deck first, burning through that, then the titanium of the hull. Five seconds later the engine room was vented to the sea. The Politovskiy's largest compartment filled rapidly with water. This destroyed what little reserve buoyancy the ship had, and the acute down-angle returned. The Alfa began her last dive.

To allow to escape through a vent.

Exhaust is vented to the outside.

To express a strong emotion.

He vents his anger violently.

Can we talk? I need to vent.

To snuff; to breathe or puff out; to snort.

Seest, howe brag yond Bullocke beares, So smirke, so smoothe, his pricked eares?[…] See howe he venteth into the wynd.

Ventriloquism.