Learner's definition of COMPLAINT
1 a [count] : a statement that you are unhappy or not satisfied with something
b [noncount] : the act of saying or writing that you are unhappy or dissatisfied with something
We lodged a complaint with the hotel manager. [=we complained to the hotel manager]
The board has received a number of complaints about the new policy.
The company has a system to handle customer complaints.
She did her chores without complaint. [=without complaining]
a letter of complaint [=a letter in which you complain about something]
You have no grounds for complaint. [=no reasons to complain]
2 [count] : something to be unhappy about : something that people complain about
The lack of parking spaces is a common complaint among the city's residents.
The lack of financial support is our biggest/only complaint.
I have no complaints with/about the service. [=I am happy with the service]
3 [count] : a pain or sickness in the body : a symptom of a disease 4 [count], law : a formal charge saying that someone has done something wrong