ALL meanings of yellow alert
yel·low a·lert
Y y - noun yellow alert (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. 1
- noun yellow alert the signal or alarm sounded for this alert. 1
- noun yellow alert any primary stage of alert, as when toxic chemicals have escaped in a particular area and a potential hazard exists. 1