complacent

Definitions:

Expressing complacency.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Civil; agreeable; having a desire or disposition to please.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Gratified; showing satisfaction.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Showing satisfaction: pleased: gratified.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Showing satisfaction; pleased with oneself.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Complacently.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adverb) (adv.) (adverb)

Usage examples:

In January 1916 the Moscow municipality discussed the advisability of voting a certain sum of money and putting it at the disposal of the chief officer of the city, to be discreetly employed in transactions with complacent railway officials, in order to further the work of reducing prices on necessaries of life.
- England and Germany by Emile Joseph Dillon
That she could have left him through any personal aversion never entered his complacent young head.
- The Rangeland Avenger by Max Brand
She cast a complacent glance about her as she motioned her nervous and preoccupied guest to a chair.
- The Iron Woman by Margaret Deland