The Collaborative International Dictionary of English v.0.48:

Overrule \O`ver*rule"\, v. t. [imp. & p. p. Overruled; p. pr.
   & vb. n. Overruling.]
   1. To rule over; to govern or determine by superior
      authority.
      [1913 Webster]

   2. To rule or determine in a contrary way; to decide against;
      to abrogate or alter; as, God overrules the purposes of
      men; the chairman overruled the point of order.
      [1913 Webster]

            His passion and animosity overruled his conscience.
                                                  --Clarendon.
      [1913 Webster]

            These [difficulties] I had habitually overruled.
                                                  --F. W.
                                                  Newman.
      [1913 Webster]

   3. (Law) To supersede, reject, annul, or rule against; as,
      the plea, or the decision, was overruled by the court.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Overruling \O`ver*rul"ing\, a.
   Exerting controlling power; as, an overruling Providence. --
   O`ver*rul"ing*ly, adv.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "overruling":
   absolute, absolutist, absolutistic, all-absorbing, arbitrary, arch,
   aristocratic, arrogant, authoritarian, authoritative, autocratic,
   banner, bossy, capital, cardinal, central, champion, chief,
   controlling, crowning, despotic, dictatorial, dominant,
   domineering, feudal, first, focal, foremost, great, grinding,
   headmost, hegemonic, high-handed, highest, imperative, imperial,
   imperious, leading, lordly, magisterial, magistral, main, master,
   masterful, monocratic, oppressive, overbearing, overriding,
   paramount, peremptory, pivotal, predominant, preeminent, premier,
   preponderant, prevailing, primal, primary, prime, principal,
   ranking, repressive, ruling, severe, sovereign, star, stellar,
   strict, supereminent, suppressive, supreme, topflight, topmost,
   tyrannical, tyrannous, uppermost