Chiefly U.S. [f. LOBBY + -IST.] One who frequents the lobbies of the House of Representatives in order to influence members in the exercise of their legislative functions. Also occas., a journalist or other person who frequents the lobby of the House of Commons.

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1863.  Cornh. Mag., Jan., 96. A Representative listening to a lobbyist.

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1888.  Bryce, Amer. Commw., I. xiv. 213. The arrangements of the committee system have produced and sustain the class of professional ‘lobbyists,’… who make it their business to ‘see’ members.

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1894.  Sat. Rev., 14 April, 383/2. The excited lobbyists who prattled last Saturday and Monday about a threatened defeat of Ministers.

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  So Lobbyism, the system of lobbying.

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1826.  Northern Sentinel, 13 Jan., 2/4. Leave to us … our freedom from bribery, corruption, lobbyism, and every other evil principle which is called into existence in the assemblage at Albany.

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1883.  Pall Mall Gaz., 6 Sept., 3/2. American manners, American lobbyism, and American corruption.

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