Definition of lobby
plural lobbies
1
:a corridor or hall connected with a larger room or series of rooms and used as a passageway or waiting room: such as
a
:an anteroom of a legislative chamber;
especially
:one of two anterooms of a British parliamentary chamber to which members go to vote during a division
b
:a large hall serving as a foyer (as of a hotel or theater)
2
:a group of persons engaged in lobbying especially as representatives of a particular interest group
- the gun lobby
- the oil lobby
