Pronunciation: (kum-plānt'),[key] —n. 1. an expression of discontent, regret, pain, censure, resentment, or grief; lament; faultfinding: his complaint about poor schools. 2. a cause of discontent, pain, grief, lamentation, etc.
3. a cause of bodily pain or ailment; malady: The doctor says I suffer from a rare complaint. 4. Law.the first pleading of the plaintiff in a civil action, stating the cause of action.