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technical. a : a message, sound, or image that is carried by waves of light or sound. The video/TV signal is scrambled. Satellite dishes receive television signals. a digital signal. The transmitter beams radio signals into space. b : a wave of light or sound that carries a message, sound, or image.
signal. noun. /ˈsɪɡnəl/ a movement or sound that you make to give someone information, instructions, a warning, etc. synonym sign a danger/warning/distress etc. signal At an agreed signal they left the room. The siren was a signal for everyone to leave the building. When I give the signal, run!
1. To make a signal to: I signaled the driver to proceed. 2. To relate or make known by signals: They have signaled their willingness to negotiate. 3. To cause an effect in (a cell) by the activation of a receptor, as by a neurotransmitter or hormone. v.intr. To make a signal or signals.
