/ Thesaurus / M Synonyms of meriwether lewis Find synonyms for: Noun1. Lewis, Meriwether Lewisusage: United States explorer and soldier who lead led an expedition from St. Louis to the mouth of the Columbia River (1774-1809)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language