All clear

noun

Definitions

Noun
  1. 1
    a signal that danger, such as an air raid, is over; usually a siren at a single pitch countable, uncountable
  2. 2
    permission to proceed because obstacles have been removed wordnet
  3. 3
    permission to proceed after obstacles have been removed countable, uncountable
  4. 4
    a signal (usually a siren) that danger is over wordnet

Etymology

all + clear

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