A puncture is a small hole in a car tyre or bicycle tyre that has been made by a sharp object.

A puncture is a small hole in someone's skin that has been made by or with a sharp object.

If a sharp object punctures something, it makes a hole in it.

If a car tyre or bicycle tyre punctures or if something punctures it, a hole is made in the tyre.

If someone's feelings or beliefs are punctured, their feelings or beliefs are made to seem wrong or foolish, especially when this makes the person feel disappointed or upset.