Definition of debouchure in English:



  • The mouth of a river or valley.

    • ‘What was the position of this debouchure in the time of Herod the Great?’
    • ‘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.’
    • ‘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.’
    • ‘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.’


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