/ Dictionary / Index G gunnery sergeant: Meaning and Definition of Find definitions for: gun'nery ser"geant Pronunciation: [key] — Marine Corps. Marine Corps. a noncommissioned officer ranking above a staff sergeant and below a first or master sergeant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gunnery gunning Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language