Valve meaning

vălv
Frequency:
The definition of a valve is a device that opens or closes to let things through or to prevent passage.

The part of your heart that opens and closes to let blood enter or to prevent blood from entering is an example of a valve.

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One of the pieces into which a plant part splits at maturity, especially a segment of a fruit capsule or of certain anthers.
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(anat.) A membranous fold or structure which permits bodily fluids to flow in one direction only, or opens and closes a tube, chamber, etc.
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Any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways.
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The movable control element of such a device.
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(anatomy) A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it.
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(chiefly british) An electron tube or a vacuum tube.
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(archaic) Either half of a double or folding door.
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To provide with a valve.
verb
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To control by means of a valve.
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(archaic) Either of the halves of a double door or any of the leaves of a folding door.
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A gate regulating the flow of water in a sluice, channel, etc.
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(music) A device in certain brass instruments, as the trumpet, that opens (or closes) an auxiliary to the main tube, lengthening (or shortening) the air column and lowering (or raising) the pitch.
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A membranous structure in a hollow organ or passage, as in an artery, that folds or closes to prevent the return flow of the body fluid passing through it.
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Any of various structures that prevent the backward flow of a body fluid, such as blood or lymph. Valves in the heart, veins, and lymphatic vessels contain flaps (known as cusps) that close in response to pressure created by the backflow of fluid.
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One of the paired hinged shells of certain mollusks, such as clams and oysters.
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A device that controls the flow of a gas or fluid through a pipe.
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A device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.
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(anatomy) 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 retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves.
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(UK) A vacuum tube.
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(botany) One of the pieces into which certain fruits naturally separate when they dehisce.
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(botany) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry.
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(biology) One of the pieces or divisions of bivalve or multivalve shells.
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(biology) One of the two similar portions of the shell of a diatom.
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To control (flow) by means of a valve.
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Origin of valve

  • Middle English leaf of a door from Latin valva wel-2 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin valva.

    From Wiktionary