1. to make dirty or pollute something
2. to damage the purity or sanctity of something sacred

1. a narrow passage between mountains or hills

Examples

• Industrial waste continued to defile the once-pristine river.
• Vandals defiled the ancient temple with graffiti.
• The army marched through the narrow defile between the cliffs.
• Protesters accused the company of defiling the sacred burial ground.
• The mountain defile provided the only route through the range.
• Chemical spills have defiled large areas of the coastline.
• The troops were vulnerable while passing through the rocky defile.