the GNU version of the Collaborative International Dictionary of English
n. Want of concern; absence of anxiety; freedom from solicitude; indifference.
The Century Dictionary and Cyclopedia
n. Want of concern; absence of anxiety; freedom from solicitude; indifferentism; indifference; apathy.
n.Synonyms Indifference, Insensibility, etc. See apathy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a feeling of lack of concern
n. the trait of remaining calm and seeming not to care; a casual lack of concern
Word Usage
"Ignore it deliberately, as a kitten stalks away with feigned unconcern from a suddenly tedious cotton-reel, in the hope that, seen afresh from the other side of the room, it will turn once more into a mouse."