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English definition of “substitute”

substitute

verb [I/T]  /ˈsʌb·stɪˌtut/ us  
to use someone or something instead of another person or thing: [T] You can substitute oil for butter in this recipe. [I] He was called on to substitute for the ailing star last night.
substitute
noun [C]  /ˈsʌb·stɪˌtut/ us  
Talk is a poor substitute for action.
(Definition of substitute from the Cambridge Academic Content Dictionary © Cambridge University Press)
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