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

 

Pinyin

 noun
noun
BrE BrE//pɪnˈjɪn//
 
; NAmE NAmE//pɪnˈjɪn//
 
[uncountable]
 
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the standard system of Roman spelling in Chinese Word Origin 1960s: from Chinese pīn-yīn, literally ‘spell-sound’.
See the Oxford Advanced American Dictionary entry: Pinyin