The Collaborative International Dictionary of English v.0.48:

Unready \Un*read"y\, a.
   1. Not ready or prepared; not prompt; slow; awkward; clumsy.
      --Dryden.
      [1913 Webster]

            Nor need the unready virgin strike her breast.
                                                  --Keble.
      [1913 Webster]

   2. Not dressed; undressed. [Obs.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Unready \Un*read"y\, v. t. [1st pref. un- + ready.]
   To undress. [Obs.] --Sir P. Sidney.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unready
    adj 1: not prepared or in a state of readiness; slow to
           understand or respond; "she cursed her unready tongue"
           [ant: ready]