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substitution

From Wiktionary
substitution is on the Academic Word List.

Pronunciation

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Noun

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Singular
substitution

Plural
substitutions

  1. (countable & uncountable) A substitution is the act of replacing one person or thing with another.
    The accidental substitution of one medicine for another can be deadly.
    They had no extra players, so were unable to make any substitutions.
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