Landau, Lev Syllabification: (Lan·dau, Lev)Pronunciation: /ˈlanˌdou, lənˈdou/Definition of Landau, Lev (1908–68), Soviet theoretical physicist; full name Lev Davidovich Landau. Active in many fields, Landau was noted for his work on the superfluidity and thermal conductivity of liquid helium. Nobel Prize for Physics (1962). Landau, Lev in other Oxford dictionaries Definition of Landau, Lev in the British & World English dictionary