Multiple choice Which is the abbreviation of ' AM' ? After Marriage Ante Meridian Air Marshal None of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation AM stands for Ante Meridian, a Latin phrase meaning 'before midday.' It refers to the time period from midnight (12:00 AM) to just before noon (11:59 AM) in the 12-hour clock system. The opposite is PM (Post Meridian, meaning 'after midday').