complaint/kəmˋplent; kəmˈpleInt/n 1 [C,U] something that you say or write when you are not happy about something 怨言﹔牢骚﹔投诉: +about We’ve received complaints about the noise. 我们收到对噪音问题的投诉。+against complaints against the police 对警察的投诉+from complaints from residents 来自居民的投诉+to I made a complaint to the boss. 我向老板投诉。letters of complaint 投诉信2 [C] something that you complain about 抱怨[投诉]的事: My only complaint is that the restaurant is far too expensive. 我唯一的不满就是这家餐厅太贵。3 [C] an illness that affects part of your body〔身体某部位的〕疾病: a chest complaint 胸部疾病