1. to express dissatisfaction or annoyance about something
Usage: third person singular present tense of ‘complain’
2. to make a formal statement saying that something is wrong or not satisfactory
Usage: often used in official or legal contexts

Examples

• She always complains about the weather.
• He complains that his boss doesn’t listen to him.
• The customer complains to the manager about poor service.
• My neighbor complains about the noise from our dog.
• She complains of headaches every morning.
• The student complains that the test was unfair.
• He never complains, even when things go wrong.