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
More than anything, robotic models are supplementary household cleaning devices.
—
Bestreviews, Mercury News, 18 Feb. 2026
With their top priority secured, Grisham returning to center field, Paul Goldschmidt recently re-signing for a reserve role, and some supplementary pieces retained or added, Judge ended up happy with the way the Yankees’ offseason concluded.
—Gary Phillips, New York Daily News, 16 Feb. 2026
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
See All Example Sentences for supplementary
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Bestreviews, Mercury News, 18 Feb. 2026
With their top priority secured, Grisham returning to center field, Paul Goldschmidt recently re-signing for a reserve role, and some supplementary pieces retained or added, Judge ended up happy with the way the Yankees’ offseason concluded.
—Gary Phillips, New York Daily News, 16 Feb. 2026
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
See All Example Sentences for supplementary
Cite this Entry
“Supplementary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/supplementary. Accessed 26 Feb. 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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