Source : Webster's Revised Unabridged Dictionary (1913)

Dominate \Dom"i*nate\, v. t. [imp. & p. p. {Dominated}; p. pr. &
   vb. n. {Dominating}.] [L. dominatus, p. p. of dominari to
   dominate, fr. dominus master, lord. See {Dame}, and cf.
   {Domineer}.]
   To predominate over; to rule; to govern. ``A city dominated
   by the ax.'' --Dickens.

         We everywhere meet with Slavonian nations either
         dominant or dominated.                   --W. Tooke.

Dominate \Dom"i*nate\, v. i.
   To be dominant. --Hallam.

Source : WordNet®

dominate
     v 1: be larger in number, quantity, power, status or importance;
          "Money reigns supreme here"; "Hispanics predominate in
          this neighborhood" [syn: {predominate}, {rule}, {reign},
           {prevail}]
     2: be in control; rule the roost; "Her husband completely
        dominates her"
     3: have dominance or the power to defeat over; "Her pain
        completely mastered her"; "The methods can master the
        problems" [syn: {master}]
     4: look down on; "The villa dominates the town" [syn: {command},
         {overlook}, {overtop}]