A dun horse's coat is a sandy/yellow or reddish/brown. A dun horses legs are normally darker than thrir body, and they sometimes have zebra stripes. Dun horses have a dorsal stripe, or a dark stripe that goes through the manin, through the dock, and through the tail. Many duns have facial markings.
In Europe, the term SUV has a similar meaning, but being newer than in the U.S. it only applies to the newer street oriented one, where-as  Jeep ,  Land Rover  or 4x4 are used for the off-roader oriented ones. Not all SUVs have four-wheel drive capabilities, and not all four-wheel-drive passenger vehicles are SUVs.
Jeep: A four-wheel drive vehicle of one-half- to one-and-one-half-ton capacity for reconnaissance or other army duty.