thin /θin/ I. adj. (thinner, thinnest) 1. 瘦的：be rather thin in the face面部消瘦 Your illness has left you very thin.你的病使你瘦了。2.细的；薄的：a thin piece of string 一根细绳The ice on the lake is too thin for skating (= …too thin to skate on). 湖面上的冰太薄了不能溜冰。3.稀薄，淡薄：thin blue 淡青；a thin soup 淡汤；a thin excuse 站不住脚的借口The air is thin on heights. 高地的空气稀薄。 4. 稀疏：thin hair 稀疏的头发 ‖II. vt. & vi.弄薄(稀)，使稀疏: to thin the stick with a knife 用刀子把这棍削细；to thin the paint 把油漆调稀 The crowd thinned after the parade was over. 游行结束后人群散了。‖III. n. 用于习语 through thick and thin 同甘苦共患难（见through条）