complaint

/kəmˈpleɪnt/ n [C/U]

Definition

› a statement that something is wrong or not good enough, the act of complaining, or the thing you are complaining about: [U] a letter of complaint [C] Her only complaint is that she sometimes didn’t get enough heat in her apartment. › law A complaint is also a formal statement to a government authority that you have a legal cause to complain about the way you have been treated: [C] He filed a complaint with the commission, charging discrimination based on his disability.

(Definition of complaint n from the Cambridge Academic Content Dictionary © Cambridge University Press)