This meaning refers to a formal request made by a customer to a business or service provider for compensation due to dissatisfaction with a product or service. It often arises in contexts where the customer feels wronged or harmed in some way.
I decided to make a complaint because I was dissatisfied with the service.
complaint; objection
In a broader context, this meaning refers to expressing dissatisfaction or discontent about something, which may not necessarily involve seeking compensation. It can be used in a variety of situations, such as voicing concerns in conversations or discussions.