Source : Webster's Revised Unabridged Dictionary (1913)

Domineering \Dom`i*neer"ing\, a.
   Ruling arrogantly; overbearing.

         A violent, brutal, domineering old reprobate. --Blackw.
                                                  Mag.

   Syn: Haughty; overbearing; lordly. See {Imperious}. --
        {Dom`i*neer"ing*ly}, adv.

Source : WordNet®

domineeringly
     adv : in a domineering manner; "his wife behaved domineeringly"