all clear

all clear

n.

A signal, usually by siren, that an air raid is over or a danger has passed.

all clear

n

1. (Military) a signal, usually a siren, indicating that some danger, such as an air raid, is over

2. an indication that obstacles are no longer present; permission to proceed: he received the all clear on the plan.

all′ clear′

n.

the signal that a danger is over.

[1915–20]

Thesaurus

Noun	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"
	2.	all clear - permission to proceed because obstacles have been removed permission - approval to do something; "he asked permission to leave"

Translations

all clear

n (Mil) → cessato allarme m inv; (fig) → okay m