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English definition of “signal”

signal

noun [C] (SHOWING)    /ˈsɪɡ.nəl/
something that shows that something else exists or is likely to happen: The poor result is a clear signal of his deteriorating confidence. 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
(Definition of signal noun (SHOWING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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