Definitions for "Debouch"
Keywords:  defile, valley, march, confined, gorge
To march out from a wood, defile, or other confined spot, into open ground; to issue.
To issue; -- said of a stream passing from a gorge out into an open valley or a plain.
march out (as from a defile) into open ground; "The regiments debouched from the valley"
Keywords:  tributary, emerge, river, big, pass
pass out or emerge; especially of rivers; "The tributary debouched into the big river"