1 [C] a statement that you are not satisfied with sth (口头或书面的)投诉:
You should make a complaint to the company that made the machine.你该向机器制造商投诉。
2 [U] the act of complaining 抱怨;投诉:
I wrote a letter of complaint to the manager about the terrible service I had received.我去信经理投诉服务太差。Jim's behaviour never gave the teachers cause for complaint.吉姆表现不错,老师们没有不满意的理由。
3 [C] an illness or disease 疾病:
a heart complaint心脏病