/ Dictionary / Index W weakly: Meaning and Definition of Find definitions for: weak•ly Pronunciation: (wēk'lē), [key] — adj., adv. -li•er, -li•est, —adj. weak or feeble in constitution; not robust; sickly. —adv. in a weak manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: weakly (Thesaurus) weakling weak-minded Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language