Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun all_clear

2 senses of all clear

Sense 1
all clear -- (a signal (usually a siren) that danger is over)
       => signal, signaling, sign -- (any nonverbal action or gesture that encodes a message; "signals from the boat suddenly stopped")

Sense 2
all clear -- (permission to proceed because obstacles have been removed)
       => permission -- (approval to do something; "he asked permission to leave")