WADI Meaning of WADI in English [ 'wα:di , 'wɒdi ](also wady ) ■ noun ( plural ~s or ~es ) (in Arabic-speaking countries) a valley, ravine, or channel that is dry except in the rainy season.OriginC17: from Arab. wādī . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004