1. extremely annoying or frustrating

Examples

• The maddening traffic jam made us two hours late.
• It’s maddening when people don’t return phone calls.
• The computer’s maddening slowness tested my patience.
• She found his constant interruptions absolutely maddening.
• The maddening noise from construction kept me awake all night.
• His maddening habit of leaving dishes in the sink annoyed his roommates.