sprinkler system
- a system of pipes and attached nozzles carrying water or other extinguishing fluid throughout a building for protection against fire: it usually operates automatically when exposed to abnormal heat
- a system of pipes and nozzles, often underground, for watering a lawn, golf course, etc.
See sprinkler system in American Heritage Dictionary 4
noun A fire-extinguishing system consisting of a network of overhead pipes that release water automatically when a predetermined temperature has been reached.