/ Dictionary / Index P Petrified Forest National Park: Meaning and Definition of Find definitions for: Pet'rified For'est Na'tional Park' Pronunciation: [key] a national park in E Arizona: buried tree trunks turned to stone by the action of mineral-laden water. 147 sq. mi. (381 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petrifaction petrify Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language