/ Dictionary / Index G giant petrel: Meaning and Definition of Find definitions for: gi'ant pet'rel Pronunciation: [key] either of two large white or brownish petrels of the genus Macronectes, of the Antarctic Ocean and adjacent seas. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. giant panda giant powder Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language