debouchure From WikiWord, the free dictionary /dɪˈbuːʃə/ English Contents DefinitionsRelated wordsReferences DefinitionsnounThe outward opening of a river, valley, or strait. Related wordsSynonymsdebouchementdebouchmentdeltaoutdraftdowntakedaledehiscencebar ditchdouitductwaydistributaryladeashdump doordrainopen diapasondump References Wiktionary — debouchure Wikipedia — debouchure