Definition of the all-clear noun from the Oxford Advanced Learner's Dictionary

     

    the all-clear

     noun
    noun
    BrE
     
    ; NAmE
     
    [singular] Recovering from illness
     
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  1. 1a signal (often a sound) which shows that a place or situation is no longer dangerous The children hid in the basement until the all-clear sounded.
  2. 2if a doctor gives somebody the all-clear, they tell the person that he/she does not have any health problems (figurative) The building was given the all-clear following tests. See related entries: Recovering from illness
  3. 3permission to do something The ship was given the all-clear to sail.
See the Oxford Advanced American Dictionary entry: the all-clear