Lobby  —n. (pl. -ies) 1 porch, ante-room, entrance-hall, or corridor. 2 a (in the house of commons) large hall used esp. For interviews between mps and the public. B (also division lobby) each of two corridors to which mps retire to vote. 3 a body of lobbyists (anti-abortion lobby). B organized rally of lobbying members of the public. 4 (prec. By the) group of journalists who receive unattributable briefings from the government (lobby correspondent). —v. (-ies, -ied) 1 solicit the support of (an influential person). 2 (of members of the public) inform in order to influence (legislators, an mp, etc.). 3 frequent a parliamentary lobby. [latin lobia lodge]