The Collaborative International Dictionary of English v.0.48:

Unlearned \Un*learn"ed\, a. [Pref. un- + learned.]
   1. Not learned; untaught; uneducated; ignorant; illiterate.
      [1913 Webster]

   2. Not gained by study; not known.
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   3. Not exhibiting learning; as, unlearned verses.
      [1913 Webster] -- Un*learn"ed*ly, adv. --
      Un*learn"ed*ness, n.
      [1913 Webster]