›a group of people that lobbies someone in authority: The leading employers' lobby called for less government regulation.a powerful/strong/influential lobbyA powerful lobby of property companies and retailers is being formed.the pro-euro/pro-business/anti-gun lobbyHis firm has given £25,000 to the pro-euro lobby.a business/consumer/trade lobbyThe government is under pressure from business lobbies who want taxes on companies reduced.environmental/farmer's/energy lobby