Breadcrumb Home > 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: centrifugal Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language