dominance

UK: /ˈdɒmɪnəns/ US: /ˈdɑmənəns/ ,(dom′ə nəns)

WordReference Random House Learner's Dictionary of American English © 2025

dom•i•nance /ˈdɑmənəns/   n. [uncountable]

1. the act or state of dominating.
2. power or authority:
   the dominance of one nation over another.

WordReference Random House Unabridged Dictionary of American English © 2025

dom•i•nance  (dom′ə nəns), n. 

1. rule;
   control;
   authority;
   ascendancy.
2. the condition of being dominant.
3. Psychiatry, Psychology the disposition of an individual to assert control in dealing with others.
4. Animal Behavior high status in a social group, usually acquired as the result of aggression, that involves the tendency to take priority in access to limited resources, as food, mates, or space.
5. Psychiatry, Medicine [Neurol.] the normal tendency for one side of the brain to be more important than the other in controlling certain functions, as speech and language.

Also, dom′i•nan•cy. 

• domin(ant) + -ance 1810–20

Collins Concise English Dictionary © HarperCollins Publishers::

dominance / ˈdɒmɪnəns/, dominancy / ˈdɒmɪnənsɪ/ noun

1. control; ascendancy