1 N-COUNT （表演平衡动作用的）高空钢丝，空中绳索 A high wire is a length of rope or wire stretched tight high above the ground and used for balancing acts. （表演平衡动作用的）高空钢丝，空中绳索

2 N-SING [oft NOUN n] （报刊用语）危险的状态，走钢丝，（行为）容易犯错误的 Journalists talk about a person being on a high wire or performing a high-wire act when he or she is dealing with a situation in which it would be easy to do the wrong thing. （报刊用语）危险的状态，走钢丝，（行为）容易犯错误的