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Definitions of sec
  1. noun
    1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites

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  2. noun
    ratio of the hypotenuse to the adjacent side of a right-angled triangle

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  3. adjective
    (of champagne) moderately dry

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  4. noun
    an independent federal agency that oversees the exchange of securities to protect investors
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