The Collaborative International Dictionary of English v.0.48:

Unlimited \Un*lim"it*ed\, a.
   1. Not limited; having no bounds; boundless; as, an unlimited
      expanse of ocean.
      [1913 Webster]

   2. Undefined; indefinite; not bounded by proper exceptions;
      as, unlimited terms. "Nothing doth more prevail than
      unlimited generalities." --Hooker.
      [1913 Webster]

   3. Unconfined; not restrained; unrestricted.
      [1913 Webster]

            Ascribe not unto God such an unlimited exercise of
            mercy as may destroy his justice.     --Rogers.
      [1913 Webster]

   Unlimited problem (Math.), a problem which is capable of an
      infinite number of solutions.

   Unlimited pump, a kind of deep-well pump placed at the
      level of the water, and operated from above ground.
      [1913 Webster] -- Un*lim"it*ed*ly, adv. --
      Un*lim"it*ed*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

unlimited
    adj 1: having no limits in range or scope; "to start with a
           theory of unlimited freedom is to end up with unlimited
           despotism"- Philip Rahv; "the limitless reaches of outer
           space" [syn: unlimited, limitless] [ant: limited]
    2: without reservation or exception [syn: outright, straight-
       out, unlimited]
    3: that cannot be entirely consumed or used up; "an
       inexhaustible supply of coal" [syn: inexhaustible,
       unlimited]