a fabric made of compressed matted animal fibers(noun.artifact)
source: wordnet30
A cloth or stuff made of matted fibers of wool, or wool and fur, fulled or wrought into a compact substance by rolling and pressure, with lees or size, without spinning or weaving.(noun)
source: webster1913
verb (v)
mat together and make felt-like(verb.contact)
Example: Felt the wool.
source: wordnet30
cover with felt(verb.contact)
Example: Felt a cap.
source: wordnet30
change texture so as to become matted and felt-like(verb.change)
Example: The fabric felted up after several washes.