a tightly stretched wire or rope fixed high above the ground, across which skilled people walk, especially in order to entertain others(尤指用于娱乐表演的)绷紧的钢丝(或绳索)
One of the acrobats who walked the tightrope at the circus did it blindfolded.马戏团里走钢丝的杂技演员中有一位是蒙着眼睛走的。