/ Dictionary / Index P pressure group: Meaning and Definition of Find definitions for: pres'sure group" Pronunciation: [key] an interest group that attempts to influence legislation through the use of lobbying techniques and propaganda. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pressure gradient pressure head 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