1. the act or process of emerging or issuing forth from a narrow or confined space into a wide, open area
Usage: formal; often used in military or geographical contexts
2. the mouth or opening where a river or stream flows out into a larger body of water
Usage: geographical; technical
3. a military maneuver in which troops emerge from a defile or narrow passage into open ground
Usage: military; historical

Examples

• The debouchment of the river into the bay created a fertile delta.
• Soldiers executed a careful debouchment from the mountain pass onto the plains.
• The narrow canyon's debouchment opened suddenly into a vast desert landscape.
• The general planned the debouchment of his forces to maximize their advantage in open terrain.
• Water from the spring found its debouchment through a series of underground channels.
• The debouchment of the valley provided strategic access to the lowlands beyond.