1. The act or process of emerging or issuing forth from a narrow or confined space into a wide, open area.
Usage: Often used in military or geographical contexts; Plural form of debouchment
2. A military maneuver in which troops emerge from a defile or narrow passage into open ground.
Usage: military term; historical usage
3. The mouth or outlet of a river where it flows into a larger body of water.
Usage: geographical term; less common usage

Examples

• The river's debouchments into the delta created multiple channels for water flow.
• The general planned the debouchments of his troops from the mountain passes.
• Several debouchments from the canyon allowed hikers to reach the open plateau.
• The debouchments of the gorge provided strategic positions for the advancing army.
• Geologists studied the debouchments where underground streams emerged at the surface.
• The narrow valley's debouchments into the plain marked the boundary between two regions.