sub in

verb

To replace something or take someone's place,

Opposite
sub out
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Meanings

verbsub in (third-person singular simple present subs in, present participle subbing in, simple past and past participle subbed in)

present singular third person subs in · participle present subbing in · participle past subbed in · past subbed in

  1. especiallyhobbiesTo replace something or take someone's place,

    As the Medford native was replacing McKennie, Shaq Moore ran off the bench to sub in for Dest. And England manager Gareth Southgate made another move while he could, Marcus Rashford for Bukayo Saka.

    25 November 2022, Jonathan Tannenwald, “U.S. dominates England for long stretches, but plays to 0-0 tie at World Cup”, in The Philadeplhia Inquirer

Synonyms & antonyms

Opposite
sub out

Origin

From sub (from substitute) + in.

Full word history & related roots →
Cite this entry
APA

sub in. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/sub%20in

MLA

“sub in.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sub%20in. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “sub in,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/sub%20in.

Source: sub in on Wiktionary, CC BY-SA 4.0.