Read the dictionary definition of tan. All definitions for this word.
1. a light brown the color of topaz
2. ratio of the opposite to the adjacent side of a right-angled triangle
3. a browning of the skin resulting from exposure to the rays of the sun
4. get a tan, from wind or sun
5. treat skins and hides with tannic acid so as to convert them into leather
6. of a light yellowish-brown color