dominant
US /ˈdɑː.mə.nənt/
UK /ˈdɑː.mə.nənt/
1.
most important, powerful, or influential.
:
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The company has a dominant position in the market.
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He is the dominant figure in the political party.
2.
(of a gene or characteristic) appearing in a hybrid or heterozygote to the exclusion of the recessive allele or characteristic.
:
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Brown eyes are a dominant trait.
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The allele for tallness is dominant over the allele for shortness.