The Collaborative International Dictionary of English v.0.48:

Lesson \Les"son\, v. t. [imp. & p. p. Lessoned (-s'nd); p. pr.
   & vb. n. Lessoning.]
   To teach; to instruct. --Shak.
   [1913 Webster]

         To rest the weary, and to soothe the sad,
         Doth lesson happier men, and shame at least the bad.
                                                  --Byron.
   [1913 Webster]