1
as in auxiliary
available to supply something extra when needed
the teacher's edition of the textbook comes with a lot of supplementary material
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in complementary
related to each other in such a way that one completes the other
regards theology and philosophy as supplementary fields of study
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of supplementary
New borrowing funded 40% of the 2025 supplementary budget, pushing the national debt to a record high.
—
Jeff Kingston, Time, 15 Feb. 2026
Some techniques for reducing carbon dioxide emissions include substituting some of the clinker – the hard residue typically made from limestone – with supplementary materials such as clay, or fly ash and slag from industries.
—Alcina Johnson Sudagar, The Conversation, 12 Feb. 2026
Despite these challenges, petalite is emerging as a promising supplementary resource to help diversify lithium supply chains and support long-term energy transition goals.
—Jijo Malayil, Interesting Engineering, 9 Feb. 2026
State lawmakers have set up potential supplementary funding from a car rental fee and oil and gas companies.
—Bruce Finley, Denver Post, 22 Jan. 2026
See All Example Sentences for supplementary
Jeff Kingston, Time, 15 Feb. 2026
Some techniques for reducing carbon dioxide emissions include substituting some of the clinker – the hard residue typically made from limestone – with supplementary materials such as clay, or fly ash and slag from industries.
—Alcina Johnson Sudagar, The Conversation, 12 Feb. 2026
Despite these challenges, petalite is emerging as a promising supplementary resource to help diversify lithium supply chains and support long-term energy transition goals.
—Jijo Malayil, Interesting Engineering, 9 Feb. 2026
State lawmakers have set up potential supplementary funding from a car rental fee and oil and gas companies.
—Bruce Finley, Denver Post, 22 Jan. 2026
See All Example Sentences for supplementary
Recent Examples of Synonyms for supplementary
Adjective
-
The only thing Doel needed to install was a DC-DC converter to output 12 volts to power the headlights, wipers, horn and other auxiliary systems.—
Ryan Brennan
March 6,
Kansas City Star,
6 Mar. 2026
-
But the celebrations in one Tehran neighborhood were also furtive and short-lived to avoid riot police or members of the Basij, a voluntary auxiliary force with the Islamic Revolutionary Guard Corps.—
Ramin Mostaghim,
Los Angeles Times,
1 Mar. 2026
Adjective
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There is now growing bipartisan recognition that the US will need two complementary engines of nuclear growth.—
John Kerry,
semafor.com,
10 Mar. 2026
-
Rather than replacing district funding, the organization functions as a complementary support system designed to help teachers access classroom materials without relying on personal spending.—
Matthew Kayser,
USA Today,
9 Mar. 2026
Adjective
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Emails seeking additional information were not immediately answered.—
Arkansas Online,
Arkansas Online,
12 Mar. 2026
-
The Cowboys now have additional draft capital to potentially bring in another defensive tackle to rotate in with starters Williams and Clark, but adding another hole in the depth of a defense already looking to stop water from getting in the boat could end up being a risky move.—
Nick Harris,
Fort Worth Star-Telegram,
12 Mar. 2026
Adjective
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Also, there’s just something poetic and reciprocal about your child passing on some of their DNA to you.—
Jennifer Byrne,
Popular Science,
5 Mar. 2026
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The county Sheriff’s Office is handling the investigation under a reciprocal agreement with San Diego police, so neither department investigates its own officers or deputies.—
Caleb Lunetta,
San Diego Union-Tribune,
3 Mar. 2026
Adjective
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Walz's forthcoming supplemental budget proposal will earmark money for that purpose.—
Caroline Cummings,
CBS News,
10 Mar. 2026
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The Broncos have held onto Courtland Sutton as their WR1, invested heavily in youth at the position, and tacked on supplemental rotational names each season.—
Luca Evans,
Denver Post,
10 Mar. 2026
Adjective
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In particular, the city had been something of a trailblazer in encouraging more backyard apartments, officially known as accessory dwelling units, though the policy has become increasingly controversial.—
Michael Smolens,
San Diego Union-Tribune,
8 Mar. 2026
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The development is expected to include 44 two- to four-bedroom units, with 22 of the homes also featuring additional two-bedroom accessory dwelling units on site.—
Nicole Buss,
Sacbee.com,
7 Mar. 2026
Cite this Entry
“Supplementary.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supplementary. Accessed 14 Mar. 2026.
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