adjective.
Uncritically satisfied with oneself or one's achievements; smug.
adjective.Apathetic with regard to an apparent need or problem.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
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."