Noun: thoughtlessness thot-lus-nus
- The quality of failing to be considerate of others
"His thoughtlessness in playing loud music late at night angered the neighbours";
- inconsideration, inconsiderateness
- The trait of not thinking carefully before acting
"His thoughtlessness often resulted in careless mistakes";
- unthoughtfulness
Type of: trait, unkindness
Antonym: thoughtfulness