signal

US /ˈsɪɡnəl/

UK /'sɪɡnəl/

A2

verb

  • To be evidence/an indication something will happen
  • To make a noise or motion to tell someone to start

noun

  • Evidence or an indication something will happen
  • Movement of a hand or other means to send messages
  • Act/sound that tells people to do/start something
  • Road-side lights that direct traffic to go or stop
  • Sound and light waves carrying TV and radio data

adjecitve

  • Most important or most noticeable