Early day hours
A.
M. is the abbreviation for *ante meridiem*, Latin for "before midday." It designates hours from midnight to noon: The meeting is at 10 A. M.
The periods are often dropped in modern usage: 7 AM, 7 am, 7 a.m.
In casual speech, in the A. M. means in the morning generally: I'll call you in the A. M.
IDEA.org / Words / A. M.
Early day hours
A.
M. is the abbreviation for *ante meridiem*, Latin for "before midday." It designates hours from midnight to noon: The meeting is at 10 A. M.
The periods are often dropped in modern usage: 7 AM, 7 am, 7 a.m.
In casual speech, in the A. M. means in the morning generally: I'll call you in the A. M.
1. time — morning, Day's early hours; dawn (Day's first glow); sunrise (Morning light's arrival); daybreak (Morning's first light); early · predawn · wee hours · before noon · clock · schedule · appointment · alarm · wake-up · commute
TIME OF DAYA. M. ≠ p.m. After-noon time notation; PM · afternoon · evening · night · nighttime
meridian, meridiem
Word data: Linguabase (CC0) · www.idea.org/words/A._M.