complainant Meaning, Definition & Usage

  1. noun a person who brings an action in a court of law
    plaintiff.

WordNet

Com*plain"ant noun
Etymology
F. complaignant, p. pr. of complaindre.
Definitions
  1. One who makes complaint.
    Eager complainants of the dispute. Collier.
  2. (Law) (a) One who commences a legal process by a complaint. (b) The party suing in equity, answering to the plaintiff at common law.
    He shall forfeit one moiety to the use of the town, and the other moiety to the use of the complainant. Statutes of Mass.

Webster 1913