(noun)
any of a family (Ursidae of the order Carnivora) of large omnivorous mammals of America and Eurasia, related to the dog and raccoon, that have long shaggy hair, a very small tail, and flat feet and feed largely on fruit, plant matter, and insects as well as on flesh;
e.g. If you encounter a black bear in the woods it is recommended you play dead instead of running so it doesn't attack you.