supplementary
adjective
sup·ple·men·ta·ry
ˌsə-plə-ˈmen-tə-rē 
-ˈmen-trē
1
: added or serving as a supplement : additional
supplementary reading
2
: being or relating to a supplement (see supplement entry 1 sense 3) or a supplementary angle
Examples of supplementary in a Sentence
a list of supplementary material for the class
the teacher's edition of the textbook comes with a lot of supplementary material
Recent Examples on the Web
In addition to the countertop surrounding the rectangular sink complete with flip-up extension on the main block, a supplementary counter block tops the refrigerator behind the wet bath on the driver's side.
—
New Atlas, 15 Apr. 2026
That duo helped carry Purdue to the national title game two years ago in a floor-spacing supplementary role around Edey.
—Christian Babcock, Mercury News, 28 Mar. 2026
The essential supplementary component arrived in the person of Frank Robinson.
—Raymond Daniel Burke, Baltimore Sun, 23 Mar. 2026
South Korea will use extra tax revenue to fund a supplementary budget to cushion households and businesses from surging oil prices triggered by the Iran war, the nation’s finance minister said.
—Heesu Lee, Bloomberg, 13 Mar. 2026
See All Example Sentences for supplementary
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New Atlas, 15 Apr. 2026
That duo helped carry Purdue to the national title game two years ago in a floor-spacing supplementary role around Edey.
—Christian Babcock, Mercury News, 28 Mar. 2026
The essential supplementary component arrived in the person of Frank Robinson.
—Raymond Daniel Burke, Baltimore Sun, 23 Mar. 2026
South Korea will use extra tax revenue to fund a supplementary budget to cushion households and businesses from surging oil prices triggered by the Iran war, the nation’s finance minister said.
—Heesu Lee, Bloomberg, 13 Mar. 2026
See All Example Sentences for supplementary
Cite this Entry
“Supplementary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/supplementary. Accessed 28 Apr. 2026.
Copy CitationKids Definition
supplementary
adjective
sup·ple·men·ta·ry
ˌsəp-lə-ˈment-ə-rē
-ˈmen-trē
1
: added as a supplement : additional
2
: being or relating to a supplement or a supplementary angle
Medical Definition
supplementary
adjective
sup·ple·men·ta·ry
ˌsəp-lə-ˈment-ə-rē, -ˈmen-trē
: added or serving as a supplement
supplementary vitamins
Legal Definition
supplementary
adjective
sup·ple·men·ta·ry
ˌsə-plə-ˈmen-tə-rē, -trē
: added or serving as a supplement
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