Meaning of “substitute” - Learner’s Dictionary


verb uk us /ˈsʌbstɪtjuːt/

B2 [ T ] to use someone or something instead of another person or thing:

You can substitute pasta for the rice, if you prefer.
substitute for sb

to do someone's job because they are not there:

I'm substituting for her while she's on holiday.
substitution uk us /ˌsʌbstɪˈtjuːʃən/ noun [ C, U ]

(Definition of “substitute verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)