all clear

短语

解除警报

词形变化

all clears 复数

释义与例句

n.
  1. 1.

    a signal that danger, such as an air raid, is over; usually a siren at a single pitch

    可数 不可数
  2. 2.

    permission to proceed after obstacles have been removed

    可数 不可数

词汇关系

名词

上位词 5

sign signal permission signaling signalling

词源

all + clear

来源：wiktionary