<p><strong>Noun</strong></p><ul><li>a barrier to obstruct the flow of water, especially one of earth, masonry, etc., built across a stream or river.</li><li>a body of water confined by a dam.</li><li>any barrier resembling a dam.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>dammed, dam·ming.</li><li>to furnish with a dam; obstruct or confine with a dam.</li><li>to stop up; block up.</li></ul>