A spout or pipe serving as a channel for liquid or gas, esp. one with a device for stopping or regulating the flow; a tap, a spigot. Also: an…

A gate or valve controlling the flow of water in a cistern, heat in a furnace, etc. Obsolete.

A tap or short pipe furnished with a valve operated from the outside by turning a key or handle, for the purpose of stopping or permitting as…

A device for regulating the passage of air, heat, or smoke, esp. in a domestic fire grate or central heating system, consisting typically of a…

Something which shuts off or closes up. gen. A hinged or sliding door or plate for closing an aperture; †a valve. Also in Mining: see quot. 1886.

Mechanics. A device of the nature of a flap, lid, plug, etc., applied to a pipe or aperture to control the passage of air, steam, water or the…

A valve. tide flap n. a valve used to shut off the tide-water from a sewer.

Something which shuts off: a tap, valve. Also, something used for stopping the operation of anything. Also attributive.

= stopcock, n.

(a) a gate placed across a railway; (b) a gate by which the water in one section of a canal can be shut off from the next in case of damage to the…