The Collaborative International Dictionary of English v.0.48:

Urn \Urn\, n. [OE. urne, L. urna; perhaps fr. urere to burn, and
   sop called as being made of burnt clay (cf. East): cf. F.
   urne.]
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   1. A vessel of various forms, usually a vase furnished with a
      foot or pedestal, employed for different purposes, as for
      holding liquids, for ornamental uses, for preserving the
      ashes of the dead after cremation, and anciently for
      holding lots to be drawn.
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            A rustic, digging in the ground by Padua, found an
            urn, or earthen pot, in which there was another urn.
                                                  --Bp. Wilkins.
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            His scattered limbs with my dead body burn,
            And once more join us in the pious urn. --Dryden.
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   2. Fig.: Any place of burial; the grave.
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            Or lay these bones in an unworthy urn,
            Tombless, with no remembrance over them. --Shak.
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   3. (Rom. Antiq.) A measure of capacity for liquids,
      containing about three gallons and a haft, wine measure.
      It was haft the amphora, and four times the congius.
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   4. (Bot.) A hollow body shaped like an urn, in which the
      spores of mosses are contained; a spore case; a theca.
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   5. A tea urn. See under Tea.
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   Urn mosses (Bot.), the order of true mosses; -- so called
      because the capsules of many kinds are urn-shaped.
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