signal has definitions from the fields of physics,electricity
[ noun ] any communication that encodes a message


sign signaling


"signals from the boat suddenly stopped"

Used in print

(James A. Ibers et al., "Proton magnetic resonance...)

The spectrometer was adjusted to minimize the amount of dispersion mode mixed_in with the absorption signal .

This measurement was obtained by W._Blumberg of the University_of_California,Berkeley , by observing the breadth of the free induction decay signal .

(Jim Berry Pearson, The Maxwell Land Grant....)

Occasionally they heard gun-shot signals and a number of horsemen were sighted on the hills , disappearing at the posse 's approach .

(Tristram Coffin, Not to the Swift....)

We knew the enemy was subdued , because a flare was fired as the signal .

(Robert L. Duncan, The Voice of Strangers....)

At two thirty he sent Fujimoto to the top of the wall at the northeast corner of the mission to keep_an_eye_on the ridge road and give a signal when he first glimpsed the approach of Kayabashi 's party .

[ verb ] communicate silently and non-verbally by signals or signs


"He signed his disapproval with a dismissive hand gesture" "The diner signaled the waiters to bring the menu"

Used in print

(Alex Gordon, The Cipher....)

He would have to climb back down to the street and signal a cop .

(Breni James, Nights of the Kill....)

Language was no problem anyway ; Mr._Phillips had only to signal from his doorway to summon aid from the ubiquitous bilingual children who played on the sidewalks of Mission_Street .

[ verb ] be a signal for or a symptom of


"These symptoms indicate a serious illness" "Her behavior points to a severe neurosis" "The economic indicators signal that the euro is undervalued"

Used in print

(San Francisco Chronicle,...)

At 12000 feet , Fiedler signaled `` release '' , and started the roaring pulse-jet engine - then streaked away from beneath the Heinkel .

(National Review...)

In defeating `` Louis_Capet '' , John_Tower 's victory in Texas signals , once_again , the end of the divine right of Liberalism .

(Rosemary Balckmon, "How Much Do You Tell When...)

Stammering or repetition of I , you , he , she , et cetera may signal ambiguity or uncertainty .

[ noun ] any incitement to action


"he awaited the signal to start" "the victory was a signal for wild celebration"

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[ noun ] (physics,electricity) an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes

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[ adjective ] notably out of the ordinary


"the year saw one signal triumph for the Labour party"

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