/ Dictionary / Index W wailful: Meaning and Definition of Find definitions for: wail•ful Pronunciation: (wāl'ful), [key] — adj. mournful; plaintive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: wailful (Thesaurus) wail Wailing Wall Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language