adj. Uncritically satisfied with oneself or one's achievements; smug.
adj. Apathetic with regard to an apparent need or problem.
the GNU version of the Collaborative International Dictionary of English
adj. Self-satisfied; contented; kindly.
The Century Dictionary and Cyclopedia
Civil; kindly; giving pleasure. See complaisant (now generally used in this sense).
Accompanied with or springing from a sense of quiet enjoyment; gratified; satisfied: as, a complacent look or smile.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. contented to a fault with oneself or one's actions
Word Usage
"The next night, in the cabin up-river, after Miriam had left them alone to what she termed their complacent silence, Garry Devereau and Steve sat a long while before the former raised a face alight with his rare mirth."