Origin: Latin prefix sub-
Substitute has 11 different meanings across 3 categories:
a person or thing that takes or can take the place of another
"When the regular coach got sick, their former assistant stepped in as substitute to lead the team through practice."
an athlete who plays only when a starter on the team is replaced
"The coach called up his favorite substitute to play during the final quarter after the starting point guard got injured."
someone who takes the place of another (as when things get dangerous or difficult)
"the star had a stand-in for dangerous scenes"
"we need extra employees for summer fill-ins"
A replacement or stand-in for something that achieves a similar result or purpose.
"When my usual coffee brand was out of stock, I bought a different type as a substitute to get the same morning energy boost."
In plain English: A substitute is someone who takes another person's place temporarily.
"He served as a substitute teacher while the principal was away."
put in the place of another; switch seemingly equivalent items
"the con artist replaced the original with a fake Rembrandt"
"substitute regular milk for fat-free milk"
"synonyms can be interchanged without a changing the context's meaning"
be a substitute
"The young teacher had to substitute for the sick colleague"
"The skim milk substitutes for cream--we are on a strict diet"
act as a substitute
"She stood in for the soprano who suffered from a cold"
To use in place of something else, with the same function.
"When I ran out of milk for my coffee, I used oat milk as a substitute to keep my morning ritual going."
In plain English: To substitute means to replace something with another option.
"I used orange juice as a substitute for apple juice in the recipe."
Usage: Use this verb when replacing an item or person to perform their original role without changing the outcome. It is often interchangeable with replace, but substitute emphasizes maintaining a specific quality or standard during the swap.
capable of substituting in any of several positions on a team
"a utility infielder"
The word substitute comes from the Latin verb substituō, which literally means "to put under" or "to set in place." It entered English through Middle French and Old French, where it carried the sense of replacing one person with another.