Bedeutung von “signal” — Learner’s Dictionary

signal

noun [ C ] us uk /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.

Mehr Beispiele

WAVE

B2 a series of electrical waves that are sent to a radio, television, or mobile phone

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.
TRAINS

a piece of equipment that tells trains to stop or to continue

VEHICLES/PEOPLE US

a piece of equipment that shows people or vehicles when to stop, go, or move carefully:

a traffic signal

(Definition von “signal noun” aus dem Cambridge Learner's Dictionary © Cambridge University Press)