signal
n. countablen. a sign, sound, or movement that gives information or a command. In computing, it is the electrical or radio wave that carries data between devices.
n. an electrical impulse or electromagnetic wave transmitted or received as a means of conveying data. Also refers to a gesture, action, or sound intended to convey an instruction or warning.
The phone has a very weak signal in this room.
The router converts the incoming internet signal into a wireless connection for all the devices in the house.
Engineers must account for signal interference when designing high-density circuits, as overlapping electromagnetic fields can corrupt the data being transmitted between components.
From Old French segnal, seignal or Medieval Latin signāle; noun use of the neuter of Late Latin signālis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s).
Commonly used with 'to' when indicating a recipient or 'for' when indicating a purpose.