signal
noun [ C ]
uk/ˈsɪɡnəl/ usa 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 signal
a 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.
signal
verb [ T ]
uk/ˈsɪɡnəl/ usUK -ll- | US -l-to show that something is going to happen or that you are going to do something:
Drops in sales signal a tough year ahead.
signal that It recently signalled that it would not stand in the way of a takeover bid.