turn signal
noun🔊/ˈtɜːn sɪɡnəl/
🔊/ˈtɜːrn sɪɡnəl/
(North American English) (British English indicator)
(also informal blinker North American English, British English)
a light on a vehicle that flashes to show that the vehicle is going to turn left or right 转向灯；方向灯 
