/ Dictionary / Index V valency: Meaning and Definition of Find definitions for: va•len•cy Pronunciation: (vā'lun-sē), [key] — pl. -cies. valence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: valency (Thesaurus) Valenciennes Valens Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language