substitution

Plural: substitutions

Noun

• an event in which one thing is substituted for another
• the act of putting one thing or person in the place of another:
  • "he sent Smith in for Jones but the substitution came too late to help"
• The act of substituting or the state of being substituted.
• A substitute or replacement.
• The replacement of an atom, or group of atoms, in a compound, with another.
• The expansion of the lexicon of a language by native means in correspondence to a foreign term.

Examples

• Gary is off this weekend, so Jeff will be his substitution.
• In this football tournament, three substitutions can be made during the match.

Synonyms

commutation, exchange, permutation, replacement, switch, transposition