/ Dictionary / Index P pressure gradient: Meaning and Definition of Find definitions for: pres'sure gra"dient Pronunciation: [key] — Meteorol. Meteorol. the change in atmospheric pressure per unit of horizontal distance in the direction in which pressure changes most rapidly. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pressure gauge pressure group Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language