The Collaborative International Dictionary of English v.0.48:

Bordar \Bord"ar\, n. [LL. bordarius, fr. borda a cottage; of
   uncertain origin.]
   A villein who rendered menial service for his cottage; a
   cottier.
   [1913 Webster]

         The cottar, the bordar, and the laborer were bound to
         aid in the work of the home farm.        --J. R. Green.
   [1913 Webster]