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signal

signal

470 2.1
A gesture or sound that tells someone to act
  • noun
  • /ˈsɪɡnəl/
: 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
237 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
209 3.3

A sign or hint that tells someone what to do

is any nonverbal act that communicates information or requests action
sign
vssignal
87 1.8

A movement made to show meaning or give an instruction

is broader, covering sounds, events, and other nonverbal prompts too
wave
vssignal
54 1.0

A hand movement to greet or attract attention

is broader, covering many types of nonverbal actions beyond hand movement
prompt
vssignal
  • Specialized
18 3.4

A short signal that tells someone to speak or act

is broader, not only for encouraging speech but any nonverbal act
motion
vssignal
14 2.0

A movement of the hand or body to signal someone

is broader, including other events or sounds that communicate or prompt action

Compounds

distress signal
  • Specialized
31 3.1

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

radio signal
  • Specialized
30 2.7

A wave used to send or receive information through the air

12 4.8

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

10 2.5

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

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

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

6 3.2

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

4 4.9

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

4 4.2

A fire lit to attract attention and show where people are

visual signal
  • Specialized
3 3.8

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

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

signal caller
  • Jargon
3 7.4

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

signal-to-noise
  • Specialized
2 6.3

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

electronic signal
  • Specialized
2 3.7

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

A sign that something dangerous may happen

signal-to-noise ratio
  • Specialized
2 6.3

How strong a wanted sound is compared to background noise

signal flag
  • Specialized
2 3.8

A rectangular piece of cloth ships use to send short messages

input signal
  • Specialized
1 3.8

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

time signal
  • Specialized
1 4.9

An electronic or radio signal that gives the exact official time

A sound or light that shows the start of a race

output signal
  • Specialized
1 3.9

An electrical message a device sends after it processes input

1 6.7

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

infrared signal
  • Specialized
1 4.1

A type of invisible light used to send information between devices

background signal
  • Specialized
1 7.5

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

storm signal
  • Philippine
1 3.3

A warning sign that a strong storm is coming

signal detection
  • Specialized
1 5.5

Finding whether a sound or message is present in noise

signal level
  • Specialized
1 4.2

The strength of an electrical connection for sound or data

signal tower
  • Specialized
1 3.6

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

flag signal
  • Specialized
1 6.3

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

1 7.1

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

signal worker
  • Jargon
1 5.6

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

signal tower
  • Specialized
1 3.5

A building where people send signals to control trains

1 3.6

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

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

wake-up signal
  • Specialized
4.2

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

How Clear

alarm
721 1.0
warning
138 1.0
signal
470 2.1
sign
∞ 3.2
hint
276 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.