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English definition of “rainmaker”

rainmaker

noun [C]     /ˈreɪnˌmeɪkər/
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 noun from the Cambridge Business English Dictionary © Cambridge University Press)
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