Definition of debouchure in English:



  • The mouth of a river or valley.

    • ‘Washing the walls of the town of Cumana - situated on its margin on the west side of its debouchure - is a long narrow arm of the sea.’
    • ‘Mr. Balfour saw that they had left the river, and were pushing up the debouchure of a sluggish little affluent.’
    • ‘This view is taken from the American side, and presents the debouchure of the waters of Niagara into Lake Ontario, from a point of great advantage.’
    • ‘What was the position of this debouchure in the time of Herod the Great?’
    • ‘It bends sharply to the right and flows southward, almost parallel to the lake shore, for more than 30 miles, to its debouchure at Milwaukee.’
    mouth, river mouth, firth
    View synonyms


Mid 19th century: alteration of embouchure, on the pattern of debouch.