Meaning

verb be larger in number, quantity, power, status or importance

verb be in control

verb have dominance or the power to defeat over

originUltimately from Latin dominor (“rule, have dominion”), either from Latin dominātus, the perfect active participle of dominor (see -ate (adjective-forming suffix)), or via phonetic alteration of the synonym dominant, from Latin domināns, the present active participle of the same. Compare the pairs predominate / predominant and obstinate / obstinant.

Etymology from Wiktionary, CC BY-SA 3.0