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signal

signal

670 2.1
A gesture or sound that tells someone to act
  • noun
  • /ˈsɪɡnəl/
translation icon : señal
  • The student's raised hand was a signal that she wanted to answer the question.
  • consent signals
  • nonverbal signals
  • verbal signals

So that is a clear signal to hold back.

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Examples

Synonyms

gesture
vssignal
245 3.2

An action done to show feeling or good will rather than to change things

is a general nonverbal action used to give information or prompt action
cue
vssignal
224 3.3

A sign or hint that tells someone what to do

is any nonverbal act that communicates information or requests action
wave
vssignal
127 1.0

A hand movement to greet or attract attention

is broader, covering many types of nonverbal actions beyond hand movement
sign
vssignal
109 1.8

A movement made to show meaning or give an instruction

is broader, covering sounds, events, and other nonverbal prompts too
motion
vssignal
92 2.0

A movement of the hand or body to signal someone

is broader, including other events or sounds that communicate or prompt action
prompt
vssignal
  • Specialized
4 3.4

A short signal that tells someone to speak or act

is broader, not only for encouraging speech but any nonverbal act

Compounds

distress signal
  • Specialized
37 3.1

A signal sent by a ship, plane, or person asking for emergency help

radio signal
  • Specialized
26 2.7

A wave used to send or receive information through the air

A system of colored lights where roads meet that tells cars and people when to go

7 2.5

A flashing light on a vehicle that shows which way the driver will turn or change lanes

7 4.8

A way to send messages over long distances by making patterns of smoke

A loud sound or flashing light that tells people there is danger

3 4.2

A fire lit to attract attention and show where people are

electronic signal
  • Specialized
2 3.7

A small flow of electricity that carries information like sound, picture or data

signal-to-noise
  • Specialized
2 6.3

How strong a wanted sound or message is compared to background noise

signal caller
  • Jargon
2 7.4

A player who leads the team's offense by calling plays, usually the quarterback

signal-to-noise ratio
  • Specialized
2 6.3

How strong a wanted sound is compared to background noise

visual signal
  • Specialized
1 3.8

A message shown by lights, signs or gestures to give people information

1 4.9

A large light that shows a bat shape in the sky to call Batman for help

A sign that something dangerous may happen

1 3.2

A light or fire used to send a message over a distance

input signal
  • Specialized
1 3.8

An electrical change that enters a device as information to be processed

output signal
  • Specialized
1 3.9

An electrical message a device sends after it processes input

time signal
  • Specialized
1 4.9

An electronic or radio signal that gives the exact official time

1 6.7

A small building where people control railway signals and switches to direct trains

signal flag
  • Specialized
1 3.8

A rectangular piece of cloth ships use to send short messages

A sound or light that shows the start of a race

background signal
  • Specialized
7.5

An unwanted noise from other sources that gets in the way of a measurement

flag signal
  • Specialized
6.3

Sending messages with flags by moving them in set patterns over a distance, often between ships

infrared signal
  • Specialized
4.1

A type of invisible light used to send information between devices

nautical signal flag
  • Specialized
6.7

A flag sailors use to send messages between ships at sea

A message sent by radio using dots and dashes

7.1

A series of short and long sounds sent over wires to show letters and words

signal tower
  • Specialized
3.5

A building where people send signals to control trains

signal tower
  • Specialized
3.6

A tall tower that holds antennas to send and receive radio or phone signals

signal worker
  • Jargon
5.6

A railway yard worker who controls and fixes signals and track switches

A sign or action that shows you need help in an emergency, like waving arms

signal level
  • Specialized
4.2

The strength of an electrical connection for sound or data

signal detection
  • Specialized
5.5

Finding whether a sound or message is present in noise

storm signal
  • Philippine
3.3

A warning sign that a strong storm is coming

3.6

A sound that makes people get out of bed, often used in camps or the military

wake-up signal
  • Specialized
4.2

An electronic signal that makes a device leave sleep mode and start working

How Clear

alarm
842 1.0
warning
1.0
signal
670 2.1
sign
3.2
hint
229 1.5

Surface Forms

signal singular
signals plural

Etymology

Signal comes from the Latin signum, which means 'sign', and is the same root as the English word sign. So a signal is a clear sign—like a nod or a raised arm—that tells someone to act.