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.

noun

applause , approval , commendation , contentedness , happiness , praise , recommendation , sanction , health

noun

accusation , annoyance , beef * , cavil , cc , charge , clamor , criticism , dissatisfaction , expostulation , fault-finding , grievance , gripe , grouse , grumble , guff * , jeremiad , kick , lament , moan , objection , plaint , protest , protestation , rap , remonstrance , remonstration , representation , reproach , rumble * , squawk , stink , trouble , wail , whine , affection , ailment , condition , disease , disorder , ill , indisposition , infirmity , malady , sickness , syndrome , upset , illness , bug , allegation , exception , information , lamentation , murmur , peeve