noun The fifth major tone of a musical scale (five major steps above the note in question); thus G is the dominant of C, A of D, and so on.
noun The triad built on the dominant tone.
noun Of an allele, that a heterozygote for the allele has the same phenotype as the homozygote.
noun A species or organism that is dominant.
noun The dominating partner in sadomasochistic sexual activity.
adjective Ruling; governing; prevailing
The dominant party controlled the government.
adjective Predominant, common, prevalent, of greatest importance.
The dominant plants of the Carboniferous were lycopods and early conifers.
adjective Of a body part, preferred and used with greater dexterity than the other, as the right hand of a right-handed person or the left hand of a left-handed one.