Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Drugs, medicines, Technologyfluoridateflu‧o‧ri‧date /ˈflʊərədeɪt $ ˈflʊr-, ˈflɔːr-/ verb [transitive] MDTto add fluoride to the water supply —fluoridation /ˌflʊərəˈdeɪʃən $ ˌflʊr-, ˌflɔːr-/ noun [uncountable]→ See Verb table ldoceonline.com