noun
plural furs
[noncount] :the hairy coat of an animal especially when it is soft and thick
the fur of an animal used for clothing [noncount]
[count] :a piece of clothing (such as a coat) made with fur
[noncount] :a material that looks and feels like the fur of an animal
[noncount] Brit :a hard material that forms in metal pipes, boilers, etc. :scale
fur flies
informal
When (the) fur flies, someone becomes very angry or upset.
US