WordWeb Online

1. March out (as from a defile) into open ground
   "The regiments debouched from the valley";
   - march out
    
2. Pass out or emerge; especially of rivers
   "The tributary debouched into the big river"

Derived forms: debouched, debouching, debouches

Type of: come forth, come out, egress, emerge, go forth, issue, march, process

Encyclopedia: Debouch