unitard Syllabification: (u·ni·tard)Pronunciation: /ˈyo͞onəˌtärd/Definition of unitard noun a tight-fitting one-piece garment of stretchable fabric that covers the body from the neck to the knees or feet. Origin: 1960s: from uni- 'single' + leotardunitard in other Oxford dictionaries Definition of unitard in the British & World English dictionary