/ Dictionary / Index L laterality: Meaning and Definition of Find definitions for: lat•er•al•i•ty Pronunciation: (lat"u-ral'i-tē), [key] — n. the use of one hand in preference to the other. Cf. handedness. the dominance or superior development of one side of the body or brain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: laterality (Thesaurus) lateral fissure lateralization Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language