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  1. Dictionary
    ground zero

    noun

    • 1. the point on the earth's surface directly above or below an exploding nuclear bomb.
    • 2. a starting point or base for an activity: "if you're starting at ground zero in terms of knowledge, go to the library"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishGROUND ZERO | English meaning - Cambridge Dictionary

    GROUND ZERO definition: 1. the exact place where a nuclear bomb explodes: 2. the place where the World Trade Center stood…. Learn more.

  3. www.merriam-webster.com › dictionary › ground zeroGround zero Definition & Meaning - Merriam-Webster

    The meaning of GROUND ZERO is the point directly above, below, or at which a nuclear explosion occurs. How to use ground zero in a sentence.

  4. dictionary.cambridge.org › us › dictionaryGROUND ZERO | definition in the Cambridge English Dictionary

    GROUND ZERO meaning: 1. the exact place where a nuclear bomb explodes: 2. the place where the World Trade Center stood…. Learn more.

  5. www.britannica.com › dictionary › ground-zeroGround zero Definition & Meaning | Britannica Dictionary

    GROUND ZERO meaning: 1 : the point on the earth's surface directly above, below, or at which an explosion (especially a nuclear explosion) occurs; 2 : the central point in an area of fast change or intense activity.

  6. www.dictionary.com › browse › ground-zeroGROUND ZERO Definition & Meaning | Dictionary.com

    noun. the point on the surface of the earth or water directly below, directly above, or at which an atomic or hydrogen bomb explodes. (sometimes initial capital letters) the site of the former World Trade Center in New York City, destroyed in the September 11, 2001 terrorist attacks.

  7. www.collinsdictionary.com › dictionary › englishGROUND ZERO definition and meaning | Collins English Dictionary

    1. a point on the surface of land or water at or directly above or below the centre of a nuclear explosion. 2. a scene of great devastation. 3. (sometimes capitals) the name given to the devastated site of the collapsed World Trade Center towers in New York after September 11 2001. Collins English Dictionary. Copyright © HarperCollins Publishers.

  8. www.history.com › topics › 21st-centuryGround Zero - Facts, Legacy & Memorial | HISTORY

    Aug 13, 2010 · Timothy A. Clary/AFP/Getty Images. Almost as soon as the World Trade Center’s Twin Towers fell on September 11, 2001, thousands of firefighters, police officers, construction workers,...

  9. www.thefreedictionary.com › ground+zeroGround zero - definition of ground zero by The Free Dictionary

    The point on the surface of the Earth at, or vertically below or above, the center of a planned or actual nuclear detonation. See also actual ground zero; desired ground zero.

  10. www.vocabulary.com › dictionary › ground zeroGround zero - Definition, Meaning & Synonyms | Vocabulary.com

    ground zero. noun. the target of a projectile (as a bomb or missile) see more. noun. the point of detonation (or above or below) of a nuclear weapon. see more. noun. the site of the World Trade Center before it was destroyed.

  11. www.oed.com › dictionary › ground-zero_nground zero, n. meanings, etymology and more - Oxford English...

    There are five meanings listed in OED's entry for the noun ground zero. See ‘Meaning & use’ for definitions, usage, and quotation evidence.