signal

US /ˈsɪɡnəl/

UK /'sɪɡnəl/

A2
v.t./i.Verb (Transitive/Intransitive)To be evidence/an indication something will happen
The cold nights signal that winter is on its way
n. (c./u.)Noun (Countable/Uncountable)Evidence or an indication something will happen
The thunder is a signal of rain on the way
adj.AdjectiveMost important or most noticeable
This is the signal truth of science, everything is built on it
n. (c./u.)Noun (Countable/Uncountable)Movement of a hand or other means to send messages
His signal tells me he wants us to come to him
n. (c./u.)Noun (Countable/Uncountable)Act/sound that tells people to do/start something
At the signal, the musicians started playing
v.t./i.Verb (Transitive/Intransitive)To make a noise or motion to tell someone to start
Just signal me when you are ready to begin the program
n. (c./u.)Noun (Countable/Uncountable)Road-side lights that direct traffic to go or stop
John, there's a red signal ahead, be careful
n. (c./u.)Noun (Countable/Uncountable)Sound and light waves carrying TV and radio data
The signal on my phone is poor here

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