Webster’s Revised Unabridged Dictionary · 1913
Relator
Re·lat′or (r?-l?t′?r), n. [ L.: cf. F. relateur. See Relate.] 1. One who relates; a relater. "The several relators of this history." Fuller.
2. (Law) A private person at whose relation, or in whose behalf, the attorney-general allows an information in the nature of a quo warranto to be filed.