- 1 more important, powerful or noticeable than other things The company has achieved a dominant position in the world market. The dominant feature of the room was the large fireplace.
- 2(biology) a dominant gene causes a person to have a particular physical characteristic, for example brown eyes, even if only one of their parents has passed on this gene compare recessive
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NAmE//ˈdɑmənəns//noun [uncountable] to achieve/assert dominance over someone political/economic dominance