signaler

/ˈsɪɡnələr/
noun
  1. A person or thing that sends a signal, especially in a military or communication context.
    • The signaler used flags to send messages across the valley.
    • In the army, a signaler is responsible for maintaining radio contact.
    • The train signaler raised the red flag to warn the driver.
  2. A device or mechanism that produces a signal, such as a light or sound.
    • The smoke detector acts as a signaler when it senses fire.
    • A buzzer serves as a signaler to announce the end of class.
    • The turn signaler on the car stopped working.
Antonyms
What does "signaler" mean? | whatsthatwordmean | whatsthatwordmean