A device that controls the flow of a gas or fluid through a space, such as a pipe, manifold, or plenum.
open the valve
close the valve
2 more examples
shut off the valve
An oil refinery has an impressively vast number and variety of valves.
2
Such a device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.
Near-synonym: poppet valve
In nearly all internal combustion engines, the valves are of the poppet type.
3
Anatomy, Medicine, Sciences One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction.
the ileocecal valve
the atrioventricular valves
4
One of the leaves of a folding door or of a window sash.
Biology, Botany, Natural sciences One of the pieces into which certain fruits naturally separate when they dehisce.
7
Biology, Botany, Natural sciences A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, such as in the barberry.
8
Biology, Natural sciences One of the pieces or divisions of bivalve or multivalve shells.
9
Biology, Natural sciences One of the two similar portions of the shell of a diatom.