AM means before noon. This is the 12-hour period from midnight to noon. PM means after noon. It covers the 12 hours from noon to midnight. Using numbers from 1 to 12, followed by am or …

The abbreviation am stands for ante meridiem, “before midday” in Latin, while pm means post meridiem, or “after midday.” The concept of a 12-hour clock has been around since ancient times.

AM definition: 1. I form of be: 2. used when referring to a time between twelve o'clock at night and twelve…. Learn more.

Jul 2, 2025 · Turns out, the answer goes back to ancient Rome and the way they watched the sky. Quick insight: a.m. means “ante meridiem” or “before midday.” p.m. means “post meridiem” or …

Jun 3, 2025 · AM and PM stand for “ante meridiem” (before midday) and “post meridiem” (after midday). In parts of the world with a 12-hour time system, people use “a.m.” or “p.m.” to clarify …

In particular, AM stands for ante meridiem, which translates into English as ‘before midday’. Meanwhile, PM is post meridiem and means in English ‘after midday’. These abbreviations are …

Definition of a.m. abbreviation in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

AM and PM are the abbreviated terms for Ante Meridiem and Post Meridiem respectively. While AM represents the time from midnight to 11:59 noon, and PM represents the time from 12 …

May 18, 2025 · AM stands for "ante meridiem," a Latin phrase that translates to "before midday" in English. This designation refers to the hours between midnight (12:00 AM) and noon (12:00 …

AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, …