Definition of platitude noun from the Oxford Advanced Learner's Dictionary

 

platitude

 noun
noun
BrE BrE//ˈplætɪtjuːd//
 
; NAmE NAmE//ˈplætɪtuːd//
 
(disapproving)
 
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a comment or statement that has been made very often before and is therefore not interesting a political speech full of platitudes and empty promises Word Origin early 19th cent.: from French, from plat ‘flat’.
See the Oxford Advanced American Dictionary entry: platitude