- (n.) One of the pieces or divisions of bivalve or multivalve shells.
- (n.) 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.
- (n.) One of the pieces into which a capsule naturally separates when it bursts.
- (n.) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry.
- (n.) A lid, plug or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning or the like, it will open or close the aperture to permit or prevent passage, as of a fluid.
- (n.) One of the two similar portions of the shell of a diatom.
- (n.) A door; especially, one of a pair of folding doors or one of the leaves of such a door.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). valve. Retrieved September 23, 2026, from http://smartdefine.org/valve/definitions/2078669 |
| Chicago | Webster's. 2011. "valve" http://smartdefine.org/valve/definitions/2078669 (accessed September 23, 2026). |
| Harvard | Webster's 2011, valve, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/valve/definitions/2078669>. |
| MLA | Webster's. "valve" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/valve/definitions/2078669> |