substitution

1. The act of substituting or the state of being substituted. (countable, uncountable) · In this football tournament, three substitutions can be made during the match.
2. A substitute or replacement. (countable, uncountable) · Gary is off this weekend, so Jeff will be his substitution.
3. The replacement of an atom, or group of atoms, in a compound, with another. (countable, uncountable)
4. The expansion of the lexicon of a language by native means in correspondence to a foreign term. (countable, uncountable)

Plural substitutions