What is the meaning of dominant?

noun

• Music) the fifth note of the diatonic scale. (
• An allele that produces the same phenotype whether its paired allele is identical or different.
  • synonyms: dominant allele

adjective

• Exercising influence or control.
  • usage: "television plays a dominant role in molding public opinion"; "the dominant partner in the marriage"
• Of genes. ( producing the same phenotype whether its allele is identical or dissimilar)
• Most frequent or common.
  • usage: "prevailing winds"
  • synonyms: prevailing, prevalent, predominant, rife