Definition of "nonchalance" []

• Casual lack of concern: "The contemptuous nonchalance of her trailed hand irritated him” ( Elizabeth Bowen). (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "There's a certain nonchalance that people kind of ..."
• "Gene Taylor used to be my Rep.; always thought he was a decent guy for a Conservadem but his nonchalance is sickening."
• "One reason for our nonchalance is that new technologies have gotten us out of many past scrapes — and maybe they will with orbital debris, too."