figurative. A person who speaks on behalf of another, an ‘instrument’, ‘mouth-piece’; one who gives a secret signal (cf. whistle, v. 10). Obsolete.

A spokesman.

A person sent to plead or speak for another; an ambassador, envoy, or messenger. Also figurative. Now historical.

A person who speaks for another or others; a spokesperson.

An advocate, a pleader; a spokesman; = prolocutor, n.

One who speaks for or on behalf of others; a spokesman.

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

In extended use: a person who speaks. A person who speaks on behalf of another or of others; a spokesperson. Cf. mouthpiece, n. 4a. Now rare.

figurative. Mouth-piece; organ. Obsolete. rare.

One who speaks in place of, or on behalf of, another or others.

A procurator; a prosecutor, informer, or spokesperson. Cf. promote, v. 6. Obsolete.

A representative or promoter of a specified cause; a spokesperson, an advocate. See also goodwill ambassador n. at goodwill, n. compounds 3.

A person who acts or speaks on another's behalf; a deputy or representative; a supporter or canvasser; a witness. Obsolete.

A representative or spokesperson, esp. one who exercises a vote. Obsolete. rare.

A person, organization, newspaper, etc., that speaks on behalf of another or others; a person who gives official or public expression to common…

With reference to the Akan peoples of West Africa: an official orator who speaks and performs duties on behalf of a chief.

figurative.

A speaker; a spokesperson.

A person who speaks for or on behalf of another or others.