Ermine refers to the winter coat of the stoat, a small mammal known for its soft, white fur. During the colder months, the stoat changes its brown summer coat to white, which helps it blend into snowy environments. The fur is highly valued for its luxurious texture and is often used in fashion and traditional garments. In addition to its use in clothing, ermine has historical significance. It was commonly associated with royalty and nobility, often seen in the robes of monarchs and in heraldry. The term "ermine" is also used to describe the fur's distinctive black-tipped tail, which adds to its elegance.