/ Dictionary / Index H hyperacidity: Meaning and Definition of Find definitions for: hy•per•a•cid•i•ty Pronunciation: (hī"pur-u-sid'i-tē), [key] — n. Pathol. excessive acidity, as of the gastric juice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hyperacidity (Thesaurus) hyper hyperactive Related Content Daily Word Quiz: maritime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language