- Noun. Someone whose job is to speak for someone's case in a court of law; a counsel. (defdate, from 14th c.) .
- Noun. Anyone who argues the case of another; an intercessor. (defdate, from 14th c.) .
- Noun. A person who speaks in support of something. (defdate, from 18th c.) .
- Noun. A person who supports someone to make their voice heard, or ideally to speak up for themselves.
- Verb. (transitive) To argue for someone else.
- Verb. (transitive) To encourage support for something.