The Collaborative International Dictionary of English v.0.48:

Unconditional \Un`con*di"tion*al\, a.
   Not conditional, limited, or conditioned; made without
   condition; absolute; unreserved; as, an unconditional
   surrender.
   [1913 Webster]

         O, pass not, Lord, an absolute decree,
         Or bind thy sentence unconditional.      --Dryden.
   [1913 Webster] -- Un`con*di"tion*al*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unconditional
    adj 1: not conditional; "unconditional surrender" [syn:
           unconditional, unconditioned] [ant: conditional]
    2: not modified or restricted by reservations; "a categorical
       denial"; "a flat refusal" [syn: categoric, categorical,
       flat, unconditional]
    3: not contingent; not determined or influenced by someone or
       something else