The Collaborative International Dictionary of English v.0.48:

Monopolize \Mo*nop"o*lize\, v. t. [imp. & p. p. Monopolized;
   p. pr. & vb. n. Monopolizing.] [From Monopoly.]
   To acquire a monopoly of; to have or get the exclusive
   privilege or means of dealing in, or the exclusive possession
   of; to engross the whole of; as, to monopolize the coffee
   trade; to monopolize land.
   [1913 Webster]