the GNU version of the Collaborative International Dictionary of English
n. Courage without sense or judgment; foolish rashness; recklessness.
The Century Dictionary and Cyclopedia
n. The quality of being foolhardy; courage without prudence or judgment; senseless rashness.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the trait of giving little thought to danger
Word Usage
"Meurons, Frances used to expostulate against what she called my foolhardiness in making these evening visits; but their presence made no difference to me."