a movement, light, sound etc used to give a warning, an order or information; an event which is the immediate cause of another activity etc
extraordinary, outstanding
Cases of word usage
1) (also called antenna) a part of a radio or TV system which receives or sends out signal (aerial)
2) (a sound or signal given) a warning of danger (alarm)
3) a repeated signal or note (as made by a car horn, electronic timer etc) (beep)
4) (to make) a short, high-pitched signal (e.g. in a hospital to call a doctor) (bleep)
5) (to give) a signal (e.g. in a drama) which shows when a person is to do or say something (cue)
6) a colourful piece of cloth, attached by one edge to a rope, used as the distinctive symbol of a country or as a signal (flag)
7) a bright burning light; a device that produces bright light, used as a signal (flare)
8) a tube-shaped case filled with fast-burning material, which launches itself into the air (as a firework, a signal of distress, or as used to launch a spacecraft) (rocket)
9) a person who gives a signal for a race to start; a device used to make an engine start to work; the firs course of a meal (starter)
10) not changing; in a state of balance; interference in the signal received by a radio or TV (static)