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Definitions

substitute

[suhb-sti-toot, -tyoot] / ˈsʌb stɪˌtut, -ˌtyut /
ADJECTIVE
alternative
Synonyms
STRONG
acting alternate backup counterfeit dummy ersatz imitation makeshift mock near proxy pseudo replacement representative reserve second sham simulated stopgap surrogate temporary
WEAK
additional another artificial experimental false other provisional spurious substitutive supplemental supplementary supposititious symbolic tentative vicarial vicarious
Antonyms
STRONG
finished genuine permanent real true
NOUN
someone or something that takes the place of another
Synonyms
STRONGEST
backup replacement stand-in surrogate
STRONG
agent alternate assistant auxiliary changeling delegate deputy double dummy equivalent expediency expedient fill in ghost locum makeshift procurator proxy recourse refuge relay relief representative reserve resort resource standby stopgap sub succedaneum successor supplanter supply symbol temp temporary understudy vicar
WEAK
dernier ressort ghost writer locum tenens pinch-hitter temporary expedient
Antonyms
STRONG
being entity permanent
VERB
interchange, exchange
Synonyms
STRONGEST
replace supplant swap
STRONG
alternate change commute deputize displace proxy relieve spell sub supersede switch
WEAK
act for answer for back up be in place of cover for do the work of double for fill in for fill one's position go as serve in one's stead stand for stand in (for) swap places with take another's place take over
Antonyms
STRONG
continue keep

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

An Anthropic spokesman said the AI is designed to help people navigate complex information and isn’t a substitute for professional medical care.

From The Wall Street Journal • Apr. 4, 2026

The winger represented Japan at the 2022 World Cup, coming on as a substitute in all four of their matches and scoring the winning goal in the stunning victory over Spain.

From BBC • Mar. 31, 2026

He reminded investors that there’s no substitute for” long-term, line-by-line analysis of capital structures” rather than relying on market sentiment to tell you when a crisis is brewing.

From MarketWatch • Mar. 31, 2026

But a model, he said, is no substitute for looking out the window.

From Barron's • Mar. 30, 2026

The dog was meant to be a substitute for Blizzard if Blizzard had to quit the race.

From "Black Star, Bright Dawn" by Scott O'Dell

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.