1. the quality or state of not being careful; lack of attention or consideration

Examples

• His carelessness with money led to serious financial problems.
• The accident was caused by the driver’s carelessness.
• She showed carelessness in her homework by making many spelling errors.
• The company’s carelessness in handling customer data resulted in a security breach.
• His carelessness while cooking nearly started a fire.
• The teacher pointed out the student’s carelessness in following directions.