transitive. To imprison, confine; to dam up (water). Obsolete.

transitive. To confine (water) in a river or canal by means of a weir, dam, etc., so as to form a head of water; to dam up. Occasionally used intr…

transitive. To dam (a body of water). Frequently with up. Now English regional (west midlands) and rare.

transitive. To hold back or limit the flow of (a watercourse, drainage system, etc.) so that a lake or body of still water builds up. Frequently with…