To express feelings of pain, dissatisfaction, or resentment.(verb-intransitive)
To make a formal accusation or bring a formal charge.(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "complain" in a sentence
"III. ii.31 (278,2) [complain of good breeding] I am in doubt whether the custom of the language in Shakespeare's time did not authorise this mode of speech, and make _complain of good breeding_ the same with _complain_ of the want of _good_ breeding."
"The squeeky wheel gets the grease so these very angry groups with "family" in their title complain and flood the fcc with complains and threaten to boycott advertisers if they continue to advertise on "family-unfriendly" shows. 90% of people in the US may not care, but that 10% makes enough noise and the networks back down and put on yet another cop or lawyer show."
"My only complain is how fantastically slow Smith is."