very well known and important

a prominent Democrat 民主党的重要人物

a prominent member of the Saudi royal family 沙特阿拉伯王室的重要成员

The government should be playing a more prominent role in promoting human rights. 政府应该在促进人权方面发挥更重要的作用。

sticking out from a surface

She has a prominent chin/nose. 她的下巴翘得厉害／鼻子很高。

Something that is in a prominent position can easily be seen or noticed.

New books are displayed in a prominent position on tables at the front of the store. 新书陈列在商店前面桌子上的一个显眼位置。