fur
n. uncountable B1 Intermediate Oxford US //ˈfɝ// UK //fˈɜː// fur
n. the thick hair that covers the bodies of many animals, like cats, dogs, or bears. People also use this word for clothes made from this soft material.
n. the dense coat of hair covering the skin of a non-human mammal. Also refers to a garment made from the pelts of such animals.
The cat has very soft, white fur.
The winter coat is lined with synthetic fur to keep the wearer warm without using animal products.
Biologists noted that the thick, oily fur of the sea otter is essential for its survival in the freezing waters of the North Pacific.
Usage
Typically uncountable when referring to the hair on an animal; can be countable when referring to a specific garment or a variety of animal pelts.