GNU Collaborative International Dictionary of English

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  1.       

    Vain, n. Vanity; emptiness; -- now used only in the phrase in vain.
    1913 Webster
    For vain. See In vain. [Obs.] Shak. -- In vain, to no purpose; without effect; ineffectually. “ In vain doth valor bleed.” Milton. “ In vain they do worship me.” Matt. xv. 9. -- To take the name of God in vain, to use the name of God with levity or profaneness.
    1913 Webster

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