Source : Webster's Revised Unabridged Dictionary (1913)

Rude \Rude\, a. [Compar. {Ruder}; superl. {Rudest}.] [F., fr. L.
   rudis.]
   1. Characterized by roughness; umpolished; raw; lacking
      delicacy or refinement; coarse.

            Such gardening tools as art, yet rude, . . . had
            formed.                               --Milton.

   2. Hence, specifically:
      (a) Unformed by taste or skill; not nicely finished; not
          smoothed or polished; -- said especially of material
          things; as, rude workmanship. ``Rude was the cloth.''
          --Chaucer.

                Rude and unpolished stones.       --Bp.
                                                  Stillingfleet.

                The heaven-born child All meanly wrapt in the
                rude manger lies.                 --Milton.
      (b) Of untaught manners; unpolished; of low rank; uncivil;
          clownish; ignorant; raw; unskillful; -- said of
          persons, or of conduct, skill, and the like. ``Mine
          ancestors were rude.''