Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “signal”

signal

noun [C]
 
 
/ˈsɪɡnəl/
ACTION B2 a movement, light, or sound that gives information, or tells people what to do: At a signal from their teacher, the children all held up their flags. Don't move until I give the signal.Signs, signals and symbolsSpecific signs and symbolsLights, signs and markings on roadsCommunications technology - general words
WAVE B2 a series of electrical waves that are sent to a radio, television, or mobile phoneCommunications technology - general words
PROOF something that shows that something else exists or is likely to happen: The changing colour of the leaves on the trees is a signal that it will soon be autumn.Signs, signals and symbolsSpecific signs and symbols
TRAINS a piece of equipment that tells trains to stop or to continueRailways and railway lines
VEHICLES/PEOPLE US a piece of equipment that shows people or vehicles when to stop, go, or move carefully: a traffic signal Signs, signals and symbolsSpecific signs and symbolsLights, signs and markings on roads
(Definition of signal noun from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “signal” in other dictionaries

Word of the Day

maiden

a girl or young woman

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More