Complaint (disambiguation) definition

(1) (criminal law) a pleading describing some wrong or offense

"He was arrested on a charge of larceny"

(2) (civil law) the first pleading of the plaintiff setting out the facts on which the claim for relief is based

(3) An expression of grievance or resentment

(4) (formerly) a loud cry (or repeated cries) of pain or rage or sorrow

(5) An often persistent bodily disorder or disease; a cause for complaining