What is Complaint?
Complaint definition and meaning on Dictionary terms:
an expression of discontent, regret, pain, censure, resentment, or grief; lament; faultfinding: his complaint about poor schools.
a cause of discontent, pain, grief, lamentation, etc.
a cause of bodily pain or ailment; malady: The doctor says I suffer from a rare complaint.
Law. the first pleading of the plaintiff in a civil action, stating the cause of action.