(in military or civilian defense) the first alert given when enemy aircraft are discovered approaching a military installation, city, coastline, etc.Compare blue alert, red alert, white alert.
the signal or alarm sounded for this alert.
any primary stage of alert, as when toxic chemicals have escaped in a particular area and a potential hazard exists.
ATW: What does 💛 - Yellow Heart Emoji mean?
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Who Is The Amber In AMBER Alert?
The term “AMBER Alert” has become synonymous with stories of missing children. So who is Amber? And why is her name blasted out to cellphones and on highway signs every time police need our help locating a child in danger? What is an AMBER Alert? First, the basics. In the suspected kidnapping of a child, an AMBER Alert is issued. This urgent bulletin is voluntarily …
Origin of yellow alert
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019