sup·​ple·​men·​tal | \ˌsə-plə-ˈmen-tᵊl \

Definition of supplemental 

1 : serving to supplement

2 : nonscheduled a supplemental airline

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Other Words from supplemental

supplemental noun

Examples of supplemental in a Sentence

She receives a supplemental income every month from the government. the new program will provide supplemental health insurance to thousands of workers

Recent Examples on the Web

The company and the Teamsters are still negotiating some local supplemental agreements for parcel workers. Paul Page, WSJ, "Today’s Logistics Report: Labor Peace in Trucking; Tankers in Rebound; Supplier Tariff Tensions," 12 Nov. 2018 Construction of the $8 billion project, which was due to begin as early as next year, is now halted until the State Department completes a supplemental environmental review. Jon Porter, The Verge, "Judge blocks Keystone XL pipeline, says government cannot ignore ‘inconvenient’ facts," 9 Nov. 2018 Still, six of 36 supplemental agreements that deal with individual local issues were rejected and have to be renegotiated, Taylor said. Thomas Black, The Seattle Times, "Teamsters union ratifies UPS deal even though members turned it down," 8 Oct. 2018 In addition, fasting is being explored as a supplemental treatment for brain injury, various cancers and metabolic syndrome. Mark Barna, Discover Magazine, "Not So Fast," 24 Sep. 2018 Most of the supplemental collagen is formulated in powder form, while some others come liquified to drink. Kaleigh Fasanella, Allure, "The Truth About Drinking Collagen Supplements for Better Skin," 14 Sep. 2018 Is this probably gonna wind up being more of a supplemental thing than a primary income for people? Eric Johnson, Recode, "Social media makes us angry and unfocused. Is email the answer?," 6 Sep. 2018 Now, both Google and Bing attempt tosurround your query with supplemental information—and encourage you to keep delving deeper. Mark Hachman, PCWorld, "Microsoft shines a 'spotlight' on Bing news searches to add more context," 27 Aug. 2018 Cleaning houses, once a supplemental sideline, has become her main gig after the factory closes. Charles Mcnulty,, "'Ironbound' at the Geffen Playhouse: An immigrant's portrait, painted with piercing realism," 9 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'supplemental.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of supplemental

1605, in the meaning defined at sense 1

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Last Updated

19 Nov 2018

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Time Traveler for supplemental

The first known use of supplemental was in 1605

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More Definitions for supplemental



English Language Learners Definition of supplemental

: added to something else to make it complete


sup·​ple·​men·​tal | \ˌsəp-lə-ˈment-ᵊl \

Medical Definition of supplemental 

: serving to supplement : supplementary


sup·​ple·​men·​tal | \ˌsə-plə-ˈment-ᵊl \

Legal Definition of supplemental 

: serving to complete or make an addition supplemental appropriations specifically : of, relating to, or being a supplemental pleading

Other Words from supplemental

supplemental noun

More from Merriam-Webster on supplemental

Rhyming Dictionary: Words that rhyme with supplemental

Thesaurus: All synonyms and antonyms for supplemental

Comments on supplemental

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a soft lustrous wool fabric with mohair

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