sprinkler

/ˈsprɪŋklər/
noun
  1. A device that sprays water, used for watering lawns, gardens, or crops.
    • The sprinkler watered the grass every evening.
    • He adjusted the sprinkler so it wouldn't soak the sidewalk.
    • Kids love to run through the sprinkler on a hot summer day.
  2. A device in a building that automatically sprays water to put out a fire.
    • The fire sprinkler went off when the smoke alarm triggered.
    • Every office floor is equipped with a sprinkler system for safety.
    • A faulty sprinkler caused water damage in the hallway.