balalaika Syllabification: (bal·a·lai·ka)Pronunciation: /ˌbaləˈlīkə/Definition of balalaika noun a guitarlike musical instrument with a triangular body and two, three, or four strings, popular in Russia and other Slavic countries. Origin: late 18th century: from Russian, of Tartar originbalalaika in other Oxford dictionaries Definition of balalaika in the British & World English dictionary