1787, American English, "member or supporter of the Federal party in U.S. politics" (originally of supporters of the Philadelphia constitution), from federal + -ist. General sense of "one who supports federal union" is from 1792. The party expired c. 1824. As an adjective by 1801.
双语例句
1. The United States is a republic which operates under federalist system.
美国是一个在联邦体系运转下的共和国.
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2. Name one of the writers of the Federalist Papers.
举出《联邦论》一位作者的名字.
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3. The Federalist Papers supported the passage of the U.S. Constitution. Name one of the writers.