One who denounces, discloses, or betrays; an accuser or betrayer.

One who accuses of crime, demands proof of innocence by wager of battle, or informs against an accomplice. (See also appealer, n., appellant, adj. n.)

A person who criminates or defames someone; an accuser.

One who impeaches; an accuser or informer.

One who brings legal evidence against another for conviction of some crime; an accuser, informer. Obsolete.

One who denounces or utters denunciations; a denouncer; in Civ. Law: One who lays an information against another.

A person who proves or offers to prove (another) guilty; hence, an informer, an accuser. Now restricted to: A person who confesses a felony and…

A person who makes an appeal; an appellant; spec. A person who brings an accusation (see appeal, n. 1).

One who denounces, in various senses of the verb. One who informs against, accuses, delates.

A person or thing that discloses, brings to light, or reveals; one who informs against or accuses; a revealer; an informer, an accuser. Obsolete.

One who accuses or brings charges (of treason, etc.). See impeach, v. 4, 5.

An accuser, an indicter; an informer.

An informer, a secret or professional accuser.

The party offering proof. Cf. approver, n.1

One who ‘appeals’ another of treason or felony: see appeal, v. 1. Obsolete exc. Historical.

One who exhibits (in various senses of the verb). Now rare; = exhibitor, n.

One who prefers or presents (an accusation). Obsolete.

One who incriminates; an accuser.

U.S. slang. A complainant, a plaintiff; a prosecutor. Cf. rap, v.2 9b. Now rare.