complainantKK [kəˋmplenənt] /kəˈmpleɪnənt/名詞1原告、告訴人法律The complainant testified for nearly two hours in court.原告在法庭上作證將近兩個小時。2申訴人、投訴人The company must inform the complainant of the outcome within ten days.公司必須在十天內告知申訴人處理結果。