/di boohsh", -bowch"/ , v.i.
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.
n.
4. débouché.
[ 1655-65; déboucher, equiv. to dé- DIS- 1 + -boucher, v. deriv. of bouche mouth bucca cheek, jaw ]