[dih-boosh, -bouch]

verb (used without object)

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.
Physical Geography.
  1. to emerge from a relatively narrow valley upon an open plain: A river or glacier debouches on the plains.
  2. to flow from a small valley into a larger one.
to come forth; emerge.


Origin of debouch

1655–65; < French déboucher, equivalent to dé- dis-1 + -boucher, verbal derivative of bouche mouth < Latin bucca cheek, jaw
Can be confuseddebauch debouch




Fortification. a passage or opening through which troops may debouch.
an outlet; an exit.

Origin of débouché

1750–60; < French, noun use of past participle of déboucher to debouch Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for debouches

Contemporary Examples of debouches

  • The existing Ambassador Bridge, the busiest border crossing on Earth, debouches into downtown Windsor.

    The Daily Beast logo
    A Billionaire's Tea Party

    David Frum

    October 27, 2012

Historical Examples of debouches

British Dictionary definitions for debouches



(intr) (esp of troops) to move into a more open space, as from a narrow or concealed place
(intr) (of a river, glacier, etc) to flow from a valley into a larger area or body


Also called: débouché (French debuʃe) fortifications an outlet or passage, as for the exit of troops

Word Origin for debouch

C18: from French déboucher, from dé- dis 1 + bouche mouth, from Latin bucca cheek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012