An entryway or reception area; vestibule; passageway; corridor.

“I had to wait in the lobby for hours before seeing the doctor.”

That part of a hall of legislation not appropriated to the official use of the assembly.

A class or group of people who try to influence public officials; collectively, lobbyists.

“The influence of the tobacco lobby has decreased considerably in the US.”

To attempt to influence (a public official or decision-maker) in favor of a specific opinion or cause.

“For years, pro-life groups have continued to lobby hard for restrictions on abortion.”