supplementary

adjective

ˌsə-plə-ˈmen-tə-rē How to pronounce supplementary (audio)
Definition of supplementarynext
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

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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

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Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of supplementary In 2024, Purja became the fastest person to summit all 14 of the peaks without supplementary oxygen. — Lex Harvey, CNN Money, 31 July 2026 Coverage is provided by Employees’ Health Insurance and National Health Insurance schemes; private insurance only plays a supplementary role. — Runchana Pongsaparn, Fortune, 31 July 2026 Natural Fertilizer Aside from conserving soil moisture, natural or pelleted wool also helps feed the soil and can be used as a supplementary fertilizer in organic gardens. — Lauren Landers, The Spruce, 20 July 2026 The supplementary motor area helps organise their sequence, and the primary motor cortex sends commands to the muscles of the trunk, shoulder, arm and wrist. — Michelle Spear, Scientific American, 11 July 2026 See All Example Sentences for supplementary
Recent Examples of Synonyms for supplementary
  1. auxiliary
  2. complementary
  3. additional
  4. reciprocal
  5. supplemental
  6. accessory
Adjective
  • The rest includes medical center revenue, contracts and grants, and other auxiliary enterprises.
    — Tarini Mehta, Sacbee.com, 6 Oct. 2026
  • Urán, an auxiliary magistrate of Colombia’s Council of State, was among the dead.
    — Antonio María Delgado, Miami Herald, 18 Sep. 2026
Definition of auxiliary
Adjective
  • Then there are those who come for emotional healing like that of the newer Embracing Change Programme, a programme that blends talking therapy and deep meditation with a life enhancement mentor, with complementary treatments on the side.
    — Condé Nast, Condé Nast Traveler, 8 Oct. 2026
  • Benaroya said Aspen is complementary to the mountain resorts where the brand sells in Europe.
    — Jean E. Palmieri, Footwear News, 8 Oct. 2026
Definition of complementary
Adjective
  • Longer life offsets costs The researchers also examined whether the additional electronics could be economically justified.
    — Neetika Walter, Interesting Engineering, 9 Oct. 2026
  • After the storms, Pritzker issued a state disaster proclamation that made additional state resources available for response and recovery, his office said.
    — Jeremy Gorner, Chicago Tribune, 9 Oct. 2026
Definition of additional
Adjective
  • The United States and China released Monday reciprocal lists of products worth about $30 billion each that will see tariff cuts, in a deal expected to boost bilateral trade.
    — ABC News, ABC News, 28 Sep. 2026
  • In another list were Washington’s reciprocal tariff cuts for Chinese small appliances such as coffee makers and toasters, tableware, blankets and bed linens.
    — Reuters, NBC news, 28 Sep. 2026
Definition of reciprocal
Adjective
  • Caltrans spokesperson Eric Menjivar said in an email Tuesday that at least some of the repairs are on hold as the agency obtains supplemental funding through an internal review process to finish the repairs.
    — Jaclyn Cosgrove, Los Angeles Times, 8 Oct. 2026
  • The city’s financial participation agreement also includes a potential agreement to pay supplemental public safety costs related to the project for up to 15 years, according to a presentation by city staff.
    — Camryn Dadey, Sacbee.com, 7 Oct. 2026
Definition of supplemental
Adjective
  • The accessory lineup has become fairly standard across brands.
    — Lauren Jarvis-Gibson, Charlotte Observer, 1 Oct. 2026
  • The back half-acre is described as technically developable, with plans showing potential for two accessory dwelling units.
    — David Caraccio, Sacbee.com, 19 Sep. 2026
Definition of accessory

Browse Nearby Words

supplemental
supplementary
supplementation
See all Nearby Words

Cite this Entry

“Supplementary.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supplementary. Accessed 9 Oct. 2026.

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