'Complain' definitions:

Definition of 'complain'

From: WordNet
verb
Express complaints, discontent, displeasure, or unhappiness; "My mother complains all day"; "She has a lot to kick about" [syn: complain, kick, plain, sound off, quetch, kvetch] [ant: cheer, cheer up, chirk up]
verb
Make a formal accusation; bring a formal charge; "The plaintiff's lawyer complained that he defendant had physically abused his client"

Definition of 'Complain'

From: GCIDE
  • Complain \Com*plain"\ (k[o^]m*pl[=a]n"), v. i. [imp. & p. p. Complained (k[o^]m*pl[=a]nd"); p. pr. & vb. n. Complaining.] [F. complaindre, LL. complangere; com- + L. plangere to strike, beat, to beat the breast or head as a sign of grief, to lament. See Plaint.]
  • 1. To give utterance to expression of grief, pain, censure, regret. etc.; to lament; to murmur; to find fault; -- commonly used with of. Also, to creak or squeak, as a timber or wheel. [1913 Webster]
  • O loss of sight, of thee I most complain! --Milton. [1913 Webster]
  • 2. To make a formal accusation; to make a charge. [1913 Webster]
  • Now, Master Shallow, you'll complain of me to the king? --Shak.
  • Syn: To repine; grumble; deplore; bewail; grieve; mourn; regret; murmur. [1913 Webster]

Definition of 'Complain'

From: GCIDE
  • Complain \Com*plain"\, v. t. To lament; to bewail. [Obs.] [1913 Webster]
  • They might the grievance inwardly complain. --Daniel. [1913 Webster]
  • By chaste Lucrece's soul that late complain'd Her wrongs to us. --Shak. [1913 Webster]

Synonyms of 'complain'

From: Moby Thesaurus