Lehár, Franz Syllabification: (Le·hár, Franz)Pronunciation: /ˈlāˌhär/Definition of Lehár, Franz (1870–1948), Hungarian composer; full name Franz Ferencz Lehár. He is known for his operettas, of which the best-known is The Merry Widow (1905). Lehár, Franz in other Oxford dictionaries Definition of Lehár, Franz in the British & World English dictionary