Burrs are a type of seed or dry fruit that have hooks or teeth that attach themselves to animal fur, human clothing, or other objects. They are essentially a clingy vehicle that some plants use to spread their seed pods far and wide. Burrs range in size from tiny enough that you don’t quite notice them to fairly large and can even be a little painful to remove depending on their size and method of attachment. Some burrs sit on the surface, whereas others can penetrate the skin and become painful. Burrs are commonly considered to be pesky as they often attach themselves to clothes, hair, or pets if they get too close.

Burrs are not limited to plants, as they can also be found in metalworking. In this context, burrs are jagged ridges that are produced in cutting or shaping metal. They are a thin ridge or area of roughness that must be filed down before a company can sell the metal to consumers.

In summary, burrs are a type of seed or dry fruit that have hooks or teeth that attach themselves to objects, including animal fur, human clothing, and metal.