/ Dictionary / Index D deeply: Meaning and Definition of Find definitions for: deep•ly Pronunciation: (dēp'lē), [key] — adv. at or to a considerable extent downward; well within or beneath a surface. to a thorough extent or profound degree: deeply pained; deeply committed. with depth of color, tone, sound, etc. with great cunning, skill, and subtlety. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deeply (Thesaurus) deep-laid deep mourning Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language