as in submarine
a large sandwich on a long split roll
we shared a tuna sub at lunch
Synonyms & Similar Words
Relevance
as in substitute
a person or thing that takes the place of another
we had a sub in English today, so we didn't get our test results back
Synonyms & Similar Words
as in to substitute
to serve as a replacement usually for a time only
the weekend anchor is subbing for the station's main anchor all this week she subbed for middle school teachers in the district as needed
Synonyms & Similar Words
Example Sentences
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Recent Examples of sub
Jesse Whittock, Deadline, 10 Feb. 2026
Writer/director Harry Lighton’s A24 release stars Alexander Skarsgård and Harry Melling as lovers on a dom-sub continuum, respectively, in London.
—Ryan Lattanzio, IndieWire, 10 Feb. 2026
Chadner Navarro, Vogue, 10 Feb. 2026
Coldest temperatures since 2023 Low temperatures continued their freefall overnight Saturday, bottoming out in the low single digits for a majority of the Tri-State Area, while areas north and west got to sub-zero readings.
—Matthew Villafane, CBS News, 8 Feb. 2026
See All Example Sentences for sub
Noun
The region reached more than 61 million subs across Indonesia, Thailand, the Philippines, Malaysia and Singapore.
—Jesse Whittock, Deadline, 10 Feb. 2026
Writer/director Harry Lighton’s A24 release stars Alexander Skarsgård and Harry Melling as lovers on a dom-sub continuum, respectively, in London.
—Ryan Lattanzio, IndieWire, 10 Feb. 2026
Verb
This sparkling cocktail is actually a riff on the Cosmopolitan, subbing out the Cointreau or Triple Sec in favor of Contratto Aperitif, an Italian liqueur similar to Campari.
—Chadner Navarro, Vogue, 10 Feb. 2026
Coldest temperatures since 2023 Low temperatures continued their freefall overnight Saturday, bottoming out in the low single digits for a majority of the Tri-State Area, while areas north and west got to sub-zero readings.
—Matthew Villafane, CBS News, 8 Feb. 2026
See All Example Sentences for sub
Recent Examples of Synonyms for sub
substitute
Verb
-
This article is for informational purposes only and does not substitute for professional medical advice.—
Kaitlyn Gomez,
Miami Herald,
5 Feb. 2026
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However, supplements don’t substitute for a balanced diet or work to treat cardiovascular disease, Saba emphasizes.—
Mara Santilli,
Flow Space,
5 Feb. 2026
Cite this Entry
“Sub.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sub. Accessed 18 Feb. 2026.
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