Bedeutung von “signal” im Essential English Dictionary

signal

noun uk /ˈsɪɡnəl/

a movement, light, or sound that gives information, or tells people what to do:

Don’t move until I give the signal.

a series of electrical waves that are sent to a radio, television, mobile phone, etc.:

My phone doesn’t work here – there’s no signal.

(Definition von “signal noun” aus dem Cambridge Essential Dictionary © Cambridge University Press)