all-clear signal編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看all-clear signalall-clear signal — 名詞名詞1. a signal indicating that a danger has passed1.名詞釋義解除警報a signal indicating that a danger has passed例句The sirens sounded the all-clear signal after the storm passed.