noun

A bollard is a short post made of metal or concrete that is used to block cars or other vehicles from entering an area. They are often seen near parks, sidewalks, and other places where people walk.

Example

1. The bollard outside the shop is used to prevent cars from entering the area.
2. We need to install more bollards to secure the perimeter.
3. The bollard is a strong metal post used for a variety of purposes.