Focus on the pronunciation of signal
English definition of “signal”
/ˈsɪgnəl/ noun [C]
› 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.