Source : Webster's Revised Unabridged Dictionary (1913)

Courb \Courb\ (k??rb), a. [F. courbe, fr. L. curvus. See
   {Curve}, a.]
   Curved; rounded. [Obs.]

         Her neck is short, her shoulders courb.  --Gower.

Courb \Courb\ (k??rb), v. i. [F. courber. See {Curs}.]
   To bend; to stop; to bow. [Obs.]

         Then I courbed on my knees.              --Piers
                                                  Plowman.