/ Dictionary / Index G Gram-negative: Meaning and Definition of Find definitions for: Gram-neg•a•tive Pronunciation: (gram'neg'u-tiv), [key] — adj. (of bacteria) not retaining the violet dye when stained by Gram's method. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gram-negative (Thesaurus) Grammy Gramont 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