1.
Someone or something that is ~ is more powerful, successful, influential, or noticeable than other people or things.
...a change which would maintain his party’s ~ position in Scotland...
= pre-eminent
ADJ
2.
A ~ gene is one that produces a particular characteristic, whether a person has only one of these genes from one parent, or two genes, one from each parent. Compare recessive . (TECHNICAL)
ADJ: usu ADJ n