The Collaborative International Dictionary of English v.0.48:

Unroll \Un*roll"\, v. t. [1st pref. un- + roll.] [Written also
   unrol.]
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   1. To open, as what is rolled or convolved; as, to unroll
      cloth; to unroll a banner.
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   2. To display; to reveal. --Dryden.
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   3. To remove from a roll or register, as a name.
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            If I make not this cheat bring out another . . . let
            me be unrolled and my name put in the book of
            virtue!                               --Shak.
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