The definition of a complaint is an expression of, or the cause of, pain, anger, discontent, regret or annoyance.
(noun)See complaint in Webster's New World College Dictionary
noun
Origin: ME complainte < OFr < complaindre
See complaint in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English compleinte
Origin: , from Old French complainte
Origin: , from
Origin: feminine past participle of complaindre, to complain; see complain
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