1. insects or their larvae that bore holes in wood, plants, or other materials
2. tools or machines used for drilling holes

Examples

• The apple tree was damaged by borers that tunneled through the bark.
• Corn borers can destroy entire crops if left untreated.
• The carpenter used several different borers to make holes for the dowels.
• Wood borers left tiny holes throughout the old furniture.
• The pest control expert identified the borers as beetle larvae.
• Heavy-duty borers are needed to drill through concrete.
• The gardener sprayed insecticide to prevent borers from attacking the roses.