- (intransitive) (esp of troops) to move into a more open space, as from a narrow or concealed place
- (intransitive) (of a river, glacier, etc) to flow from a valley into a larger area or body
WordReference Random House Unabridged Dictionary of American English © 2026
de•bouch
(di bo̅o̅sh′, -bouch′),USA pronunciation v.i.
n.
- Militaryto 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.
- Geography[Physical Geog.]
- to emerge from a relatively narrow valley upon an open plain:A river or glacier debouches on the plains.
- to flow from a small valley into a larger one.
- to come forth;
emerge.
n.
- débouché.
- Latin bucca cheek, jaw
- French déboucher, equivalent. to dé- dis-1 + -boucher, verb, verbal derivative of bouche mouth
- 1655–65
Collins Concise English Dictionary © HarperCollins Publishers::
debouch /dɪˈbaʊtʃ/ vb
'debouch' also found in these entries (note: many are not synonyms or translations):