the GNU version of the Collaborative International Dictionary of English
n. Lack of caution.
The Century Dictionary and Cyclopedia
n. Lack of caution; heedlessness.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the trait of forgetting or ignoring possible danger
Word Usage
"Research is cited that supposedly shows that readers are vulnerable to a kind of cognitive incaution and "must engage in effortful processing to disbelieve the information they encounter in literary narratives.""