The Collaborative International Dictionary of English v.0.48:
Unbred \Un*bred"\, a. 1. Not begotten; unborn. [Obs.] "Thou age unbred." --Shak. [1913 Webster] 2. Not taught or trained; -- with to. --Dryden. [1913 Webster] 3. Not well-bred; ill-bred. [Obs.] --Locke. [1913 Webster]