n.
 (pl. lobbies)
   - a room out of which one or more other rooms or corridors lead, typically one near the entrance of a public building.
 - (in the UK) any of several large halls in the Houses of Parliament in which MPs may meet members of the public. 
▸
(also division lobby)
 each of two corridors in the Houses of Parliament to which MPs retire to vote.
 - a group of people seeking to influence legislators on a particular issue. 
▸an organized attempt by members of the public to influence legislators.
 
v.
 (lobbies, lobbying, lobbied)
 seek to influence (a legislator).
 
  Derivative
  
  Etymology
  C16 (in the sense ‘monastic cloister’): from med. L. lobia, lobium ‘covered walk’.