PLAINT Meaning of PLAINT in English ■ noun1》 Law, Brit. an accusation; a charge. 2》 chiefly literary a com~ or lamentation.OriginME: from OFr. ~e , feminine past participle of plaindre 'complain'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004