The Collaborative International Dictionary of English v.0.48:

Macadamize \Mac*ad"am*ize\, v. t. [imp. & p. p. Macadamized;
   p. pr. & vb. n. Macadamizing.] [From John Loudon McAdam,
   who introduced the process into Great Britain in 1816.]
   To cover, as a road, or street, parking lot, playground, or
   other flat area, with macadam, so as to form a smooth,
   hard, convex surface.

   Syn: tarmac.
        [1913 Webster]