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  1. AM and PM: What Do They Mean? - timeanddate.com

    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 …

  2. PM - Wikipedia

    Look up PM, Pm, pm, or p.m. in Wiktionary, the free dictionary. PM or pm (also written P.M. or p.m.) is an abbreviation for Latin post meridiem, meaning "after midday" in the 12-hour clock. PM or Pm or …

  3. 12-hour clock | Description, History, and Facts | Britannica

    The first is referred to as am, which stands for ante meridiem, “before midday” in Latin, while the second is referred to using pm, meaning post meridiem, or “after midday.” This nomenclature is based on the …

  4. AM and PM - Meaning, Full Form of AM PM | Relation with 24-Hour …

    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 …

  5. What do AM and PM mean? - World Time Clock & Map

    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 …

  6. P.M. | definition in the Cambridge English Dictionary

    P.M. meaning: 1. used when referring to a time in the afternoon or evening or at night: 2. abbreviation for…. Learn more.

  7. am, pm or a.m., p.m. | Online English Usage Dictionary

    Separate the abbreviations from their number with a non-breaking space. The abbreviations stand for ante meridiem (before noon) and post meridiem (after noon) and are used strictly with twelve-hour time.

  8. What Do "A.M." and "P.M." Stand For? - Reader's Digest

    May 20, 2025 · The abbreviation p.m. stands for post meridiem, meaning “after noon” or “after midday.” This applies to all times from 12 p.m. to 11:59 p.m. While the origin of the terms can be traced back to...

  9. AM and PM in English: Meaning, Usage, and Examples

    In English, AM and PM are abbreviations used to divide the 24 hours of the day into two 12-hour periods on the 12-hour clock system. These labels help distinguish between morning and afternoon/evening …

  10. p.m. - Wiktionary, the free dictionary

    Dec 24, 2025 · The 12-hour clock uses A.M. for the morning hours of midnight (12:00 A.M.) to almost noon (11:59 A.M.) and the P.M. designation for the hours from noon (12:00 P.M.) to almost midnight …