Definition of diphthong noun from the Oxford Advanced American Dictionary

 

diphthong

 noun
noun
NAmE//ˈdɪfθɔŋ//
 
, NAmE//ˈdɪfθɑŋ//
 
, NAmE//ˈdɪpθɔŋ//
 
, NAmE//ˈdɪpθɑŋ//
 
(phonetics)
 
jump to other results
a combination of two vowel sounds or vowel letters, for example the sounds// in pipe/paɪp/ or the letters ou in doubt compare monophthong, triphthong
diphthongal
 
jump to other results
NAmE//dɪfˈθɔŋɡl//
 
, NAmE//dɪfˈθɑŋɡl//
 
, NAmE//dɪpˈθɔŋɡl//
 
, NAmE//dɪpˈθɑŋɡl//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: diphthong