Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
warning signal | Yes | No | No | No |
air alert | Yes | No | No | No |
warning signal (noun) | air alert (noun) |
---|---|
an automatic signal (usually a sound) warning of danger | the warning signal that begins a period of preparation for an enemy air attack |
the condition in which combat aircraft are airborne and ready for an operation | |
the time period during which military and civilian agencies are prepared for an enemy air attack |