As a Noun: 1. A person who publicly supports a particular action or plan, often on behalf of other people. English = advocate 2. The action of publicly supporting a particular action or plan, often on behalf of other people. English = advocacy 3. A group of people who try to persuade a government or council that a particular thing should be done. English = lobby. As a Verb or Adjective: 1. To publicly support a particular plan or action. English = advocate. 2. Of a group of people, to try to persuade a government or council that a particular thing should be done. English = lobby.