1. lack of interest, worry, or involvement in something

Examples

• His nonconcern about the upcoming exam worried his parents.
• The manager’s nonconcern for employee safety led to several accidents.
• She showed complete nonconcern when told about the company’s financial troubles.
• The politician’s nonconcern about environmental issues cost him votes.
• Their nonconcern for proper procedures resulted in costly mistakes.
• The teacher was frustrated by the students’ nonconcern about their grades.