Foolhardy disregard of danger; recklessness.(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.
Use "temerity" in a sentence
"They were, naturally, delighted at everything they saw, and admired her model greatly: but were, nevertheless, loud in their expressions of wonder at what they termed our temerity in venturing on so long a voyage in such a mere boat."
"She even persists in these things, and is honestly horrified at what she calls the temerity of going without them."
"Lee had two surgeons in his corps, Irvine and Skinner; Irvine was apt to expose himself to danger, but Skinner, although he had on one occasion killed his adversary in a duel, was a coward; and the method he now took to punish Irvine for what he called his temerity, was not to dress his wounds until the last."