1. a hole made by piercing or boring through something
2. the action of making holes in something
3. a row of small holes that allows something to be torn off easily

Examples

• The bullet left a small perforation in the metal sheet.
• Tear along the perforation to separate the coupon.
• The doctor examined the perforation in the patient’s eardrum.
• Postage stamps have perforations around their edges.
• The perforation of the paper was done by a special machine.
• A nail caused a perforation in the tire.
• The notebook pages can be removed cleanly at the perforation.