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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 …

  2. 12-hour clock | Description, History, and Facts | Britannica

    12-hour clock, time convention that splits a 24-hour day into two equal 12-hour periods. The first is referred to as am, which stands for ante meridiem, “before midday” in Latin, while the second …

  3. 12-hour clock - Wikipedia

    Originally there were two cycles: one cycle which could be tracked by the position of the Sun (day), followed by one cycle which could be tracked by the Moon and stars (night). This …

  4. AM | English meaning - Cambridge Dictionary

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

  5. Why We Say a.m. and p.m. and What They Actually Mean

    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 …

  6. 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 …

  7. AM Radio Stations

    There are 4,339 AM radio stations in America, broadcasting between the frequency range of 540 kHz to 1700 kHz within the medium wave broadcast band using Amplitude Modulation.

  8. 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 …

  9. Star Country 96.9 - EastTexasRadio.com

    Starting in January, the Trump administration will begin garnishing the wages of those in default. A 30-day notice will be sent nationally beginning January 7. Texas has an estimated student …

  10. AM Definition & Meaning | Dictionary.com

    The abbreviation a.m. for Latin ante merīdiem, meaning “before noon,” refers to the period from midnight until noon. One minute before noon is 11:59 a.m. One minute after noon is 12:01 …