sup·​ple·​men·​ta·​ry | \ ˌsə-plə-ˈmen-tə-rē How to pronounce supplementary (audio) , -ˈmen-trē\

Definition of supplementary

1 : added or serving as a supplement : additional supplementary reading
2 : being or relating to a supplement or a supplementary angle

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Synonyms & Antonyms for supplementary


accessorial, accessory, appurtenant, auxiliary, peripheral, supplemental


chief, main, principal

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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

The supplementary state aid fund, overseen by the Connecticut Coalition to End Homelessness, drew upon $600,000 in state money allocated by the state legislature and more than $338,000 provided by private donors. Chris Ehrmann,, "Housing aid for Puerto Rican evacuees close to running out," 9 Sep. 2019 This, the company claims, is between two and three times more than a conventional greenhouse with an equivalent but horizontal growing area, and equipped with supplementary lighting and heating, could manage. The Economist, "New ways to make vertical farming stack up," 29 Aug. 2019 Due to its anti-inflammatory properties and effects, CBD is being studied as a major breakthrough in alternative and supplementary care for a range of issues, including movement disorders, chronic pain, epilepsy, and, of course, anxiety. Sponsored Content With Pure Farmaceuticals, Houston Chronicle, "6 Natural Ways to Treat Anxiety," 29 July 2019 Recently, Yang has tried to respond to his critics by promising to make the UBI supplementary to Social Security. Benjamin Studebaker, The New Republic, "The Real Stakes of Trump’s Trade War With China," 27 Aug. 2019 Upon the call to duty, the members of the inactive militia would muster and bring all their firearms and ammunition to the muster point, providing their armament for supplementary use by the active militia. Letters To The Editor, The Mercury News, "Letter: Establish a ‘well-regulated militia’ in every city, county," 11 Aug. 2019 The university has since created a supplementary web page,, to communicate to its community about the ongoing inconvenience. Elizabeth Hernandez, The Denver Post, "Regis University’s technology systems targeted by “malicious threat” likely from outside the country," 23 Aug. 2019 For all its potential, the system is largely a supplementary tool. Jack Harriswriter, Los Angeles Times, "Virtual reality batting practice head-set is Dodgers’ real-life preparation tool," 22 Aug. 2019 Areas of the lawn in especially hot dry areas such as along the driveway can usually be greened up with a supplementary hand watering once per week. Calvin Finch,, "It’s time to prep your roses, San Antonio," 16 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'supplementary.' 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 supplementary

1667, in the meaning defined at sense 1

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Statistics for supplementary

Last Updated

25 Sep 2019

Look-up Popularity

Time Traveler for supplementary

The first known use of supplementary was in 1667

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More Definitions for supplementary


sup·​ple·​men·​ta·​ry | \ ˌsə-plə-ˈmen-tə-rē How to pronounce supplementary (audio) \

Kids Definition of supplementary

: added to something else : additional supplementary income


sup·​ple·​men·​ta·​ry | \ ˌsəp-lə-ˈment-ə-rē, -ˈmen-trē How to pronounce supplementary (audio) \

Medical Definition of supplementary

: added or serving as a supplement supplementary vitamins


sup·​ple·​men·​ta·​ry | \ ˌsə-plə-ˈmen-tə-rē, -trē How to pronounce supplementary (audio) \

Legal Definition of supplementary

: added or serving as a supplement

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Comments on supplementary

What made you want to look up supplementary? Please tell us where you read or heard it (including the quote, if possible).


suitable to be imparted to the public

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