The mouth of a river or valley.
- 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.
- 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.
Mid 19th century: alteration of embouchure, on the pattern of debouch.
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