As a Noun: 1. A group of people who try to persuade a government or council that a particular thing should be done. English = lobby. 2. The activity of trying to persuade a government or council that a particular thing should be done. English = lobbying. 3. A person who tries to persuade a government or council that a particular thing should be done. English = lobbyist. As a Verb or Adjective: 1. To try to persuade a member of a government or council that a particular thing should be done. English = lobby.