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 pm, the …

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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 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 noon to 11:59 …

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

May 20, 2025 · The abbreviation a.m. stands for ante meridiem, a Latin phrase that means “before noon” or “before midday.” That’s why, in the 12-hour system, all times from midnight until noon get …

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 used to identify …