The Collaborative International Dictionary of English v.0.48:

Unroll \Un*roll"\, v. t. [1st pref. un- + roll.] [Written also
   unrol.]
   [1913 Webster]
   1. To open, as what is rolled or convolved; as, to unroll
      cloth; to unroll a banner.
      [1913 Webster]

   2. To display; to reveal. --Dryden.
      [1913 Webster]

   3. To remove from a roll or register, as a name.
      [1913 Webster]

            If I make not this cheat bring out another . . . let
            me be unrolled and my name put in the book of
            virtue!                               --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

unroll
    v 1: reverse the winding or twisting of; "unwind a ball of yarn"
         [syn: unwind, wind off, unroll] [ant: roll,
         twine, wind, wrap]
    2: unroll, unfold, or spread out or be unrolled, unfolded, or
       spread out from a furled state; "unfurl a banner" [syn:
       unfurl, unroll] [ant: roll up, wrap up]

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "unroll":
   bare, break the seal, bring to light, clear, deobstruct, develop,
   disclose, discover, dismask, draw the veil, expose, free, impart,
   lay bare, lay open, let daylight in, let out, manifest, open,
   open up, patefy, raise the curtain, reveal, show, show up,
   strip bare, unblock, uncase, unclench, uncloak, unclog, unclutch,
   uncoil, uncork, uncover, uncurtain, undo, undrape, unfold, unfoul,
   unfurl, unkennel, unlatch, unlock, unmask, unpack, unplug, unreel,
   unscreen, unseal, unsheathe, unshroud, unshut, unstop, unveil,
   unwind, unwrap