Source : Webster's Revised Unabridged Dictionary (1913)

Bevel \Bev"el\, n. [C. F. biveau, earlier buveau, Sp. baivel; of
   unknown origin. Cf. {Bevile}.]
   1. Any angle other than a right angle; the angle which one
      surface makes with another when they are not at right
      angles; the slant or inclination of such surface; as, to
      give a bevel to the edge of a table or a stone slab; the
      bevel of a piece of timber.

   2. An instrument consisting of two rules or arms, jointed
      together at one end, and opening to any angle, for
      adjusting the surfaces of work to the same or a given
      inclination; -- called also a {bevel square}. --Gwilt.

Bevel \Bev"el\, a.
   1. Having the slant of a bevel; slanting.

   2. Hence: Morally distorted; not upright. [Poetic]

            I may be straight, though they themselves be bevel.
                                                  --Shak.

   {A bevel angle}, any angle other than one of 90[deg].

   {Bevel wheel}, a cogwheel whose working face is oblique to
      the axis. --Knight.

Bevel \Bev"el\, v. t. [imp. & p. p. {Beveled} (?) or {Bevelled};
   p. pr. & vb. n. {Beveling} or {Bevelling}.]
   To cut to a bevel angle; to slope the edge or surface of.

Bevel \Bev"el\, v. i.
   To deviate or incline from an angle of 90[deg], as a surface;
   to slant.

         Their houses are very ill built, the walls bevel.
                                                  --Swift.

Source : WordNet®

bevel
     n 1: two surfaces meeting at an angle different from 90 degrees
          [syn: {cant}, {chamfer}]
     2: a hand tool consisting of two rules that are hinged together
        so you can draw or measure angles of any size [syn: {bevel
        square}]
     [also: {bevelling}, {bevelled}]

bevel
     v : cut a bevel on; shape to a bevel; "bevel the surface" [syn:
         {chamfer}]
     [also: {bevelling}, {bevelled}]