/ Dictionary / Index G greatly: Meaning and Definition of Find definitions for: great•ly Pronunciation: (grāt'lē), [key] — adv. in or to a great degree; much: greatly improved in health. in a great manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: greatly (Thesaurus) great lobelia Great Miami 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