/ Thesaurus / A Synonyms of ante meridiem Find synonyms for: Adjective1. ante meridiem, a.m., antemeridian (vs. postmeridian)usage: before noonAdverb1. ante meridiem, A.M.usage: before noon; "let's meet at 11 A.M."WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language