Noun Definitiontan1.Definition: a browning of the skin resulting from exposure to the rays of the sunRelated Noun(s):burn, sunburn, suntanCategory: General2.Definition: a light brown the color of topazRelated Noun(s):topazCategory: General3.Definition: ratio of the opposite to the adjacent side of a right-angled triangleRelated Noun(s):tangentCategory: General