COMPLAINANT, noun 1. A prosecutor; one who prosecutes by complaint, or commences a legal process against an offender for the recovery of a right or penalty. He shall forfeit one moiety to the use of the town; and the other moiety to the use of the complainant 2. The plaintiff in a writ of Audita Querela.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI