an older male gorilla (= a large ape) that has white or silver hair on its back and is the dominant (= controlling) member of its group

The large 21-year-old silverback keeps a wary eye over his family group. 这名体积庞大的21岁银背大猩猩一直保持警惕，关注着自己的家族群。

an older man who likes to have power and control over other people

For at least 40 years Norman Mailer was the silverback of the literary scene. 在长达40年的时间里，诺曼·梅勒就像是文学界的“银背大猩猩”。