资料来源 : Webster's Revised Unabridged Dictionary (1913)

But \But\, n. [See 1st {But}.]
   1. A limit; a boundary.

   2. The end; esp. the larger or thicker end, or the blunt, in
      distinction from the sharp, end. See 1st {Butt}.

   {But end}, the larger or thicker end; as, the but end of a
      log; the but end of a musket. See {Butt}, n.