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  1. Dictionary
    Rock
    /räk/

    noun

    • 1. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans: "the beds of rock are slightly tilted"
    • 2. a large piece of rock which has become detached from a cliff or mountain; a boulder: "the stream flowed through a jumble of rocks"