from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. disregard for other's feelings
- n. heedless disregard for the consequences of one's actions
from The Century Dictionary and Cyclopedia
- n. The state of being thoughtless, heedless, or inconsiderate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the trait of not thinking carefully before acting
- n. the quality of failing to be considerate of others
thoughtless + -ness (Wiktionary)