The Collaborative International Dictionary of English v.0.48:

Bush \Bush\, v. t. [imp. & p. p. Bushed (b[.u]sht); p. pr. &
   vb. n. Bushing.]
   1. To set bushes for; to support with bushes; as, to bush
      peas.
      [1913 Webster]

   2. To use a bush harrow on (land), for covering seeds sown;
      to harrow with a bush; as, to bush a piece of land; to
      bush seeds into the ground.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bushing \Bush"ing\, n. [See 4th Bush.]
   1. The operation of fitting bushes, or linings, into holes or
      places where wear is to be received, or friction
      diminished, as pivot holes, etc.
      [1913 Webster]

   2. (Mech.) A bush or lining; -- sometimes called a thimble.
      See 4th Bush.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bushing
    n 1: an insulating liner in an opening through which conductors
         pass
    2: a cylindrical metal lining used to reduce friction [syn:
       bushing, cylindrical lining]