- any of several slender, chiefly arboreal carnivores of the genus Martes, of northern forests, having a long, glossy coat and bushy tail.
- the fur of such an animal, generally a dark brown.
- any of several agile arboreal musteline mammals of the genus Martes, of Europe, Asia, and North America, having bushy tails and golden brown to blackish fur
- the highly valued fur of these animals, esp that of M. americana
