WordofTheDay.US

substitution

/ˌsʌb.stɪˈtʃuː.ʃən/ noun

Latin root: substitutio Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about substitution at Wordnik → Where our words come from →

  1. The act of substituting or the state of being substituted.
    In this football tournament, three substitutions can be made during the match.
  2. A substitute or replacement.
    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.

Origin

From Middle French substitution, from Late Latin substitutio.

From Wiktionary, via Kaikki.org (CC BY-SA)