A jaguar is a large animal of the cat family with dark spots on its back. Jag a famous type of British car that is large and very comfortable. a large South American wild cat with brown and yellow fur with black spots (yaguar and jaguar, from yaguara and jaguara). Largest New World cat. Once found in wooded regions from the U.S.-Mexican border south to Patagonia, the jaguar (Panthera onca) survives, in reduced numbers, only in remote areas of Central and South America; the largest known population is in the Amazon rain forest. The male is 5.5-9 ft (1.7-2.7 m) long, including the 23-35-in. (60-90-cm) tail, and weighs 220-350 lbs (100-160 kg). The coat is typically orange-tan with black spots arranged in rosettes having a black spot in the centre. A solitary predator, the jaguar usually hunts rodents, deer, birds, and fish; it will also take cattle, horses, and dogs