dam up

(redirected from dammed up)

dam up

To block something from flowing freely, typically water in a stream, river, etc. A noun or pronoun can be used between "dam" and "up." If we don't dam up the river, this rain will cause a flood.
See also: dam, up

dam something up

to erect a barrier in a river, stream, brook, etc. We are going to have to dam this stream up to make a pond for the cattle. Let's dam up this stream. Why is this river dammed up?
See also: dam, up
References in classic literature ?
Here, not merely the river itself, but every rivulet flowing into it, was dammed up by communities of industrious beavers, so as to inundate the neighborhood, and make continual swamps.
"And people don't realize that Lake Lanier is the Chattahoochee dammed up - that it gave part of its life to a big impoundment which is, in turn, helping the city of Atlanta grow and develop.