: being before noon —abbreviation AM, a.m., or (British) am. See the full definition.
Is Meridiem Latin?
The term, first recorded in English in 1563, is from Latin: ante (before) and meridiem (midday).
What is the difference between Meridian and Meridiem?
Ante Meridian is a misspelling of: Antimeridian, a meridian at 180° from another or the meridian opposite the prime meridian. Ante meridiem, normally abbreviated a.m., Latin for "before midday"