Definition of bitonal adjective from the Oxford Advanced American Dictionary

 

bitonal

 adjective
adjective
NAmE//ˌbaɪˈtoʊnl//
 
(music)
 
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having parts in two different keys sounding together
NAmE//ˌbaɪtoʊˈnælət̮i//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: bitonal