Definition of washing powder noun from the Oxford Advanced Learner's Dictionary

 

washing powder

 noun
noun
BrE BrE//ˈwɒʃɪŋ paʊdə(r)//
 
; NAmE NAmE//ˈwɑːʃɪŋ paʊdər//
 
[uncountable](British English)
 
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soap or detergent in the form of powder for washing clothes