One who speaks for another; an advocate. (The later examples are Scottish.)

In Civil Law, a person with whom the parties in a suit deposit the thing contested until the case has been decided. Also, in wider sense, a mediator.

A person who acts as mediator, intermediary, negotiator, or ambassador between others; a person who… In singular and plural. Obsolete.

An interpreter; a mediator, an intercessor.

gen. A person who intervenes between two parties, esp. for the purpose of effecting reconciliation; an intercessor; a person who brings about an…

gen. A person who pleads for or speaks on behalf of another; a person who supports, recommends, or speaks favourably of another.

One who intercedes or interposes on behalf of another; a mediator.

A guardian, protector, or patron. Cf. avowe, n.

transferred. An advocate, pleader, mediator. ? Obsolete.

An advocate; a spokesperson or orator who speaks on behalf of someone else. Now historical and rare.

In extended and allusive uses.

A guardian, protector, or patron saint; = advocate, n. 3. Obsolete.

One who intercedes; an intercessor; a go-between; one who intervenes.

An intercessor.

In extended use. A superintendent, agent, go-between.

U.S. A person employed to mediate between citizens and local government or other official agencies. Also: a person who represents the interests of (a…