/ Dictionary / Index A alkalinity: Meaning and Definition of Find definitions for: al•ka•lin•i•ty Pronunciation: (al"ku-lin'i-tē), [key] — n. Chem. alkaline condition; the quality that constitutes an alkali. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alkalinity (Thesaurus) alkaline phosphatase alkali rock Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language