noun
Definition: Small balls of fiber that form on the surface of fabric due to wear and tear.
Example: After several washes, the sweater started to show pilling, making it look old and worn out.
verb
Definition: To form small balls or lumps on a surface, often referring to fabric or material that has developed these small, fuzzy balls due to wear.
Example: After several washes, the sweater started pilling and looked worn out.