1. stopped working; broke down
Usage: informal
2. fell asleep suddenly
Usage: informal
3. hit someone on the head
Usage: informal

Examples

• My car conked out on the highway.
• The old computer finally conked out after ten years.
• He conked out on the couch after dinner.
• She conked out during the boring lecture.
• The baseball conked him on the head.
• The engine conked out in the middle of nowhere.
• I conked out early last night.