dominating

US /ˈdɑː.mə.neɪ.t̬ɪŋ/
UK /ˈdɑː.mə.neɪ.t̬ɪŋ/
1.

egemen

being the largest, most important, most noticeable, or the best person or thing:

:
The other dominating issue is board members' expenses.