ante meridiem

[ an-tee muh-rid-ee-uhm, -em ]
/ ˈæn ti məˈrɪd i əm, -ˌɛm /

adverb

before noon.See also a.m.

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Origin of ante meridiem

First recorded in 1555–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for ante meridiem

ante meridiem
/ (ˈæntɪ məˈrɪdɪəm) /

the full form of a.m.

Word Origin for ante meridiem

Latin, from ante- + merīdiēs midday
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012