'Complacent' definitions:

Definition of 'complacent'

From: WordNet
adjective
Contented to a fault with oneself or one's actions; "he had become complacent after years of success"; "his self- satisfied dignity" [syn: complacent, self-satisfied, self-complacent]

Definition of 'Complacent'

From: GCIDE
  • Complacent \Com*pla"cent\, a. [L. complacens very pleasing, p. pr. of complacere; com- + placere to please: cf. F. complaisant. See Please and cf. Complaisant.] Self-satisfied; contented; kindly; as, a complacent temper; a complacent smile. [1913 Webster]
  • They look up with a sort of complacent awe . . . to kings. --Burke. [1913 Webster]

Synonyms of 'complacent'

From: Moby Thesaurus