sprinkler Syllabification: (sprin·kler)Pronunciation: /ˈspriNGk(ə)lər/Translate sprinkler | into French | into German | into Italian | into Spanish Definition of sprinkler noun a device that sprays water. a device used for watering lawns. an automatic fire extinguisher installed in the ceilings of a building. sprinkler in other Oxford dictionaries Definition of sprinkler in the British & World English dictionary