Rotary Syllabification: (Ro·ta·ry)Pronunciation: /ˈrōtərē/ (in full Rotary International)Definition of Rotary trademark a worldwide charitable society of businessmen, businesswomen, and professional people, formed in 1905. Derivatives RotarianPronunciation: /rōˈte(ə)rēən/ noun & adjective Origin:so named because members hosted events in rotationRotary in other Oxford dictionaries Definition of Rotary in the British & World English dictionary