American English

Definition of unctuous adjective from the Oxford Advanced American Dictionary

 

unctuous

 adjective
adjective
NAmE//ˈʌŋktʃuəs//
 
(formal) (disapproving)
 
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friendly or giving praise in a way that is not sincere and that is therefore unpleasant an unctuous host
 
adverb
See the Oxford Advanced Learner's Dictionary entry: unctuous