the all cleara) LET/ALLOWofficial permission to begin doing something 批准,准许give (somebody)/get the all clear We’ve got the all clear for the new project. 这个新项目我们已经得到批准。
b) PMa signal such as a loud whistle that tells you that a dangerous situation has ended 警报解除信号
→ the all clear at all clear(1)