Pronunciation: (di-bOOsh', -bouch'), [key]
1. to march out from a narrow or confined place into open country, as a body of troops: The platoon debouched from the defile into the plain.
2. Physical Geog.
a. to emerge from a relatively narrow valley upon an open plain: A river or glacier debouches on the plains.
b. to flow from a small valley into a larger one.
3. to come forth; emerge.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.