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valve

play
noun \ˈvalv\

Simple Definition of valve

  • : a mechanical device that controls the flow of liquid, gas, etc., by opening and closing

  • : a device in some musical instruments (such as trumpets) that you press to play different notes

  • medical : a structure in the heart, stomach, etc., that temporarily stops the flow of fluid or that allows fluid to move in one direction only

Source: Merriam-Webster's Learner's Dictionary

Full Definition of valve

  1. 1 archaic :  a leaf of a folding or double door

  2. 2 [New Latin valva, from Latin] :  a bodily structure (as the mitral valve) that closes temporarily a passage or orifice or permits movement of fluid in one direction only

  3. 3 a :  any of numerous mechanical devices by which the flow of liquid, gas, or loose material in bulk may be started, stopped, or regulated by a movable part that opens, shuts, or partially obstructs one or more ports or passageways; also :  the movable part of such a device b :  a device in a brass instrument for quickly channeling air flow through an added length of tube in order to change the fundamental tone by some definite interval c chiefly British :  electron tube

  4. 4 [New Latin valva, from Latin] :  one of the distinct usually hinged and movable pieces of which the shell of some shell-bearing animals (as lamellibranch mollusks, brachiopods, and barnacles) consists

  5. 5 [New Latin valva, from Latin] a :  one of the segments or pieces into which a dehiscing capsule or legume separates b :  the portion of various anthers (as of the barberry) resembling a lid c :  one of the two encasing membranes of a diatom

valved

play \ˈvalvd\ adjective

valveless

play \ˈvalv-ləs\ adjective

Examples of valve in a sentence

  1. They turned off the main water valve to the house.



Origin and Etymology of valve

Latin valva; akin to Latin volvere to roll — more at voluble


First Known Use: 14th century



VALVE Defined for Kids

valve

play
noun \ˈvalv\

Definition of valve for Students

  1. 1 :  a structure in the body that temporarily closes to prevent passage of material or allow movement of a fluid in one direction only <a heart valve>

  2. 2 :  a mechanical device by which the flow of liquid, gas, or loose material may be controlled by a movable part

  3. 3 :  a device on a brass musical instrument that changes the pitch of the tone

  4. 4 :  one of the separate pieces that make up the shell of some animals (as clams) and are often hinged




Medical Dictionary

valve

play
noun \ˈvalv\

Medical Definition of valve

  1. 1:  a bodily structure (as the mitral valve) that closes temporarily a passage or orifice or permits movement of fluid in one direction only

  2. 2:  any of various mechanical devices by which the flow of liquid (as blood) may be started, stopped, or regulated by a movable part that opens, shuts, or partially obstructs one or more ports or passageways; also :  the movable part of such a device



Illustration of valve



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