Substitute Definition

sŭbstĭ-to͝ot, -tyo͝ot
substituted, substitutes, substituting
noun
substitutes
A person or thing serving or used in place of another.
Webster's New World
Any word or word group, as a pronoun, the verb to do, etc., used in place of another word or words (Ex.: did for shouted in “she shouted, and he did, too”)
Webster's New World

A replacement or stand-in for something that achieves a similar result or purpose.

Wiktionary
(sports) A player who is available to replace another if the need arises, and who may or may not actually do so.
Wiktionary
Antonyms:
verb
substituted, substitutes, substituting
To act or serve in place of another.
Webster's New World
To put or use in place of another.
Webster's New World
To take the place of.
Webster's New World
To replace as a substituent.
Webster's New World
adjective
Being a substitute or substitutes.
Webster's New World

Other Word Forms of Substitute

Noun

Singular:
substitute
Plural:
substitutes

Origin of Substitute

  • Middle English from Old French substitut from Latin substitūtus past participle of substituere to substitute sub- in place of sub– statuere to cause to stand stā- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin substitutum, past participle of substituo.

    From Wiktionary

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