Breadcrumb Home > Thesaurus > W Synonyms of weir Find synonyms for: Noun 1. weir, dam, dike, dyke usage: a low dam built across a stream to raise its level or divert its flow 2. weir, fence, fencing usage: a fence or wattle built across a stream to catch or retain fish WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of weir (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: suigeneris Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language