a.

1. 占优势的，支配的，统治的
   the dominant partner of a business

   公司中举足轻重的合伙人

   The dominant influence in her life was her father.

   她一生中对她影响最大的是她父亲。

2. 高耸的；占首位的
   a dominant cliff

   高耸的悬崖

3. 【生】（遗传性状）优势的，显性的
4. 【音】全阶第五音的

n.

1. 【音】全阶第五音[C]
2. 【生】显性；显性状（或基因）；优势种[U][C]

adj.

1. most important, powerful, or influential.
   ▸Ecology  denoting the predominant species in a plant or animal community.
2. (of a high place or object) overlooking others.
3. Genetics  relating to or denoting heritable characteristics which are controlled by genes that are expressed in offspring even when inherited from only one parent. Often contrasted with recessive.

n.

1. Music  the fifth note of the diatonic scale of any key, considered in relation to the key of the tonic.
2. Genetics  a dominant trait or gene.
3. Ecology  a dominant species in a community.