<p><strong>Noun:</strong></p><ul><li>an expression of discontent, regret, pain, censure, resentment, or grief; lament; faultfinding: his complaint about poor schools.</li><li>a cause of discontent, pain, grief, lamentation, etc.</li><li>a cause of bodily pain or ailment; malady: The doctor says I suffer from a rare complaint.</li><li>Synonyms: ailment, illness, sickness.</li><li>Law: the first pleading of the plaintiff in a civil action, stating the cause of action.</li></ul>