regulator Get Printable Handwriting (reg-u-la-tor) 4 syllables Rhymes Learn It! Spelling Test Definition noun. 1 control or device for regulating or controlling fluid flow or pressure or temperature or etc; 2 official responsible for control and supervision of an activity Example Sentence Is this the regulator for the furnace? Synonyms control; swith; thermostat; valve Antonyms fluid Rhymes Four Syllable Rhymes (1) regulator Share with your friends: