tar /tɑ:/ I. n. ［u］ 焦油；沥青：low-tar cigarettes焦油含量低的香烟 The roof was covered with tar.屋顶涂抹了一层沥青。‖II. vt. (tarred, tarring) 涂焦油，铺沥青：a newly tarred road新铺的柏油马路