Meaning of “rainmaker” in the English Dictionary

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"rainmaker" in Business English

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rainmakernoun [ C ]

uk /ˈreɪnˌmeɪkər/ us

someone who makes a lot of money for a company or who helps someone or something to succeed:

The firm needed a rainmaker to bring in business and to raise capital.
For the Democrats, he became a valued rainmaker, contributing nearly $1 million.

(Definition of “rainmaker” from the Cambridge Business English Dictionary © Cambridge University Press)