ALL meanings of complainer
com·plain
C c - countable noun complainer A complainer is someone who complains a lot about their problems or about things they do not like. 3
- noun complainer One who complains, or is known for their complaints. 1
- verb without object complainer to express dissatisfaction, pain, uneasiness, censure, resentment, or grief; find fault: He complained constantly about the noise in the corridor. 1
- verb without object complainer to tell of one's pains, ailments, etc.: to complain of a backache. 1
- verb without object complainer to make a formal accusation: If you think you've been swindled, complain to the police. 1