the GNU version of the Collaborative International Dictionary of English
n. The quality of being casual.
The Century Dictionary and Cyclopedia
n. The state of being casual; casuality.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a casual manner
Word Usage
"A certain casualness, almost freedom, in the way the prisoners (except, of course, the ones in the segregation sector) walk around in the hallways, talking, pausing if they want, and in the way they are dressed."