signal /ˈsɪɡnəl/
(noun)
dấu hiệu, tín hiệu
Ví dụ:
  • All I get is a busy signal when I dial his number (= his phone is being used).
  • At an agreed signal they left the room.
  • hand signals(= movements that cyclists and drivers make with their hands to tell other people that they are going to stop, turn, etc.)

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