signals

noun

A sequence of states representing an encoded message in a communication channel.
Any variation of a quantity or change in an entity over time that conveys information upon detection.
A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
An on-off light, semaphore, or other device used to give an indication to another person.
(of a radio, TV, telephone, internet, etc.) An electromagnetic action, normally a voltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party.
My mobile phone can't get a signal in the railway station.
An action, change or process done to convey information and thus reduce uncertainty.
A token; an indication; a foreshadowing; a sign.
Useful information, as opposed to noise.
A simple interprocess communication used to notify a process or thread of an occurrence.
A signalling interaction between cells

verb

To indicate; to convey or communicate by a signal.
To communicate with (a person or system) by a signal.
Seeing the flames, he ran to the control room and signalled headquarters.

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