1. not working or operating; broken or out of order

Examples

• The nonfunctioning elevator forced residents to use the stairs.
• We need to replace the nonfunctioning air conditioner before summer.
• The nonfunctioning printer has been sitting in the corner for weeks.
• Several nonfunctioning streetlights made the neighborhood darker at night.
• The technician identified the nonfunctioning component and ordered a replacement.
• A nonfunctioning smoke detector is a serious safety hazard.