GNU Collaborative International Dictionary of English

Found 2 definitions 

  1.       

    Tun , n. [AS. tunne. See Ton a weight.]
    1. A large cask; an oblong vessel bulging in the middle, like a pipe or puncheon, and girt with hoops; a wine cask.
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    2. (Brewing) A fermenting vat.
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    3. A certain measure for liquids, as for wine, equal to two pipes, four hogsheads, or 252 gallons. In different countries, the tun differs in quantity.
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    4. (Com.) A weight of 2,240 pounds. See Ton. [R.]
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    5. An indefinite large quantity.
      Shak.

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      A tun of man in thy large bulk is writ.
      Dryden.

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    6. A drunkard; -- so called humorously, or in contempt.
      Dryden.

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    7. (Zool.) Any shell belonging to Dolium and allied genera; -- called also tun-shell.
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  2.       

    Tun, v. t. [imp. & p. p. Tunned ; p. pr. & vb. n. Tunning.] To put into tuns, or casks.
    Boyle.

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