/ Dictionary / Index G grampus: Meaning and Definition of Find definitions for: gram•pus Pronunciation: (gram'pus), [key] — pl. -pus•es. a cetacean, Grampus griseus, of the dolphin family, widely distributed in northern seas. any of various related cetaceans, as the killer whale, Orcinus (Orca) orca. a giant whip scorpion common to Florida. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grampus (Thesaurus) gramps Gram-Schmidt orthogonalization Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language