This red traffic light is a signal to stop.
- Signal means out of the ordinary or remarkable.
An example of signal used as an adjective is the phrase a "signal win" which means a team that usually loses has just won.
- The definition of a signal is a message or means of communicating a message.
An example of a signal is a red light.
- To signal is defined as to communicate or indicate.
An example of signal is to hold up one finger to mean you'll be there in a minute.
- Now Rare a token or indication
- a sign or event fixed or understood as the occasion for prearranged combined action: a bugle signal to attack
- anything which occasions a certain action or response
- a sign given by gesture, sound or call, flashing light, etc.
- an object or device, as a red flag, flashing light, etc., providing such a sign
- in some card games, a bid or play designed to guide one's partner
- in radio, television, cell phones, etc., the electrical impulses, sound or picture elements, etc. transmitted or received
- [pl.]Football code words, numbers, etc. called out, esp. by the quarterback, to indicate which play or defense to use next
Origin of signalOld French from Vulgar Latin signale from neuter of Late Latin signalis from Classical Latin signum, a sign
- not average or ordinary; remarkable; notable
- used as a signal or in signaling
transitive verb-·naled or -·nalled, -·nal·ing or -·nal·ling
- to make a signal or signals to
- to make known or communicate (information) by signals
- a. An indicator, such as a gesture or colored light, that serves as a means of communication. See Synonyms at gesture.b. A message communicated by such means.
- Something that incites action: The peace treaty was the signal for celebration.
- Biology A physical entity, such as a chemical or an electromagnetic wave, that activates a cell receptor and elicits a specific response.
- a. Electronics An impulse or fluctuating quantity, as of electrical voltage or light intensity, whose variations represent coded information.b. Computers A sequence of digital values whose variations represent coded information.
- The sound, image, or message transmitted or received by means of telecommunications.
verbsig·naled, sig·nal·ing, sig·nals, or sig·nalled sig·nal·ling
- To make a signal to: I signaled the driver to proceed.
- To relate or make known by signals: They have signaled their willingness to negotiate.
- To cause an effect in (a cell) by the activation of a receptor, as by a neurotransmitter or hormone.
Origin of signalMiddle English from Old French from Medieval Latin signāle from neuter of Late Latin signālis of a sign from Latin signum sign ; see sign .
- sig′nal·er sig′nal·ler
- 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 electrical or 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.
- A token; an indication; a foreshadowing; a sign.
- Useful information, as opposed to noise.
- (computing, Unix) A simple interprocess communication used to notify a process or thread of an occurrence.
- To indicate.
- Standing above others in rank, importance, or achievement.
- a signal exploit; a signal service; a signal act of benevolence
- signature (adjective)
From Old French segnal, seignal or Medieval Latin signÄle, noun use of the neuter of Late Latin signÄlis, from Latin signum.
signal - Computer Definition
An electromagnetic impulse or wave transmitted to convey information in telecommunications, telegraphy, television, radio, radar, etc.
Any electrical or light pulse or frequency whether in a wire or fiber or wireless. The term is somewhat generic and may refer to virtually anything that is generated and transmitted (power, data, control signals). Although the term may be used by itself later on in a description or article, it is often used at least initially with another word, such as "carrier signal," "data signal" or "control signal." See signal-to-noise ratio and control signal. Signal Vs. Signaling A "signal" can refer to a data signal or a control signal, but "signaling" refers to transmitting only control signals. It is very common to hear the term in the telecom industry, where "signaling" means setting up and breaking down a call, but does not refer to the actual pulses or frequencies of the data (voice, text, etc.) itself (see SS7 and signaling).