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English definition of “signal”

signal

noun [C]     /ˈsɪɡnəl/
a sign that something is true or that something is going to happen : a signal to sb It is a signal to the rest of the world that we are serious about global warming . a clear / strong / important signala signal of sth It was a strong signal of the power now wielded by big institutional investors . mixed / conflicting / contradicting signals the right / wrong signal a positive signal
COMMUNICATIONS a series of electrical or radio waves that are sent to a radio , television , or mobile phone in order to produce a sound , picture , or message : I couldn't get a signal on my phone .
(Definition of signal noun from the Cambridge Business English Dictionary © Cambridge University Press)
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