valve meaning
EN
[ˈvælv] WValve
- A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.
- The simplest, and very ancient, valve is simply a freely hinged flap which drops to obstruct fluid (gas or liquid) flow in one direction, but is pushed open by flow in the opposite direction.
- Valves have many uses, including controlling water for Irrigation, industrial uses for controlling processes, residential uses such as on / off & pressure control to dish and clothes washers & taps in the home.
FR valve 
- NounPLvalves
- A device that controls the flow of a gas or fluid through a pipe.
- A device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.
- (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.
- (Britain) A vacuum tube.
- (botany) One of the pieces into which certain fruits naturally separate when they dehisce.
- (botany) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry.
- (biology) One of the pieces or divisions of bivalve or multivalve shells.
- (biology) One of the two similar portions of the shell of a diatom.
- A device that controls the flow of a gas or fluid through a pipe.
- VerbSGvalvesPRvalvingPT, PPvalved
- (transitive) To control (flow) by means of a valve.
- (transitive) To control (flow) by means of a valve.
- More Examples
- Used in the Middle of Sentence
- The tricuspid valve was also involved with fibroinflammatory debris consistent with endocarditis.
- The valve was inserted transapically in a standard fashion.
- The inside of a valve has whetted parts constructed of corrosion resistant material.
- Used in the Ending of Sentence
- To ensure that there are no leaks, clean the surfaces before you reseat the valve.
- Used in the Middle of Sentence
Definition of valve in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Transitive verbs
- Transitive verbs
- Nouns
Source: Wiktionary
Grammatically, this word "valve" is a noun, more specifically, a countable noun. It's also a verb, more specifically, a transitive verb.