from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A signal, usually by siren, that an air raid is over or a danger has passed.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun a
signalthat danger, such as an air raid, is over; usually a sirenat a single pitch
permissionto proceedafter obstacleshave been removed
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a signal (usually a siren) that danger is over
- noun permission to proceed because obstacles have been removed
from Wiktionary, Creative Commons Attribution/Share-Alike License
all + clear
Sorry, no example sentences found.