noun

1. a person or thing serving or used in place of another
2. Gram. 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”)

Etymology: ME < L substitutus, pp. of substituere, to put instead of < sub-, under + statuere, to put, place: see statue

transitive verb substituted -·tut′ed, substituting -·tut′·ing

1. to put or use in place of another
2. Now Rare to take the place of
3. Chem. to replace as a substituent

intransitive verb

adjective