Origin: Latin suffix -tion
Substitution has 3 different meanings across 1 category:
an event in which one thing is substituted for another
"the replacement of lost blood by a transfusion of donor blood"
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 coach made a last-minute substitution, sending on his fastest runner to catch up with the opposing team."
The act of substituting or the state of being substituted.
"The substitution of fresh herbs in the recipe improved the flavor significantly."
In plain English: Substitution is when you replace something with another thing to take its place.
"The football player made an immediate substitution before halftime because he was injured."
Usage: Use this term to describe replacing one person, thing, or element with another in sports, cooking recipes, or logical arguments. It is often confused with "replacement," but substitution specifically emphasizes the active process of making that change rather than just the result.
The word entered English via Middle French and comes from the Late Latin substitutio. It originally referred to the act of placing someone or something under another before evolving into its current meaning regarding replacement.