/ Dictionary / Index W wadi: Meaning and Definition of Find definitions for: wa•di Pronunciation: (wä'dē), [key] — pl. -dis. the channel of a watercourse that is dry except during periods of rainfall. such a stream or watercourse itself. a valley. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: wadi (Thesaurus) wader Wadi Halfa 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