supplemental

adjective

sup·​ple·​men·​tal ˌsə-plə-ˈmen-tᵊl 

1

: serving to supplement

2

: nonscheduled

a supplemental airline

supplemental noun

Synonyms of supplemental

• auxiliary
• additional
• supplementary
• accessory
• peripheral

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

But exact legislative timing for when a supplemental bill will be introduced to get funding reinstated is not yet known, said David Ladd, a lobbyist working with MAISA. —Beki San Martin, Freep.com, 5 Dec. 2025

One firm, Braintree, prohibits families from spending supplemental funds on garden gloves or aprons. —Sarah Cutler, Idaho Statesman, 3 Dec. 2025

Nor could defendants produce any supplemental declarations after the hearing describing the training that such deputized non-DHS agents received. —New York Times, 2 Dec. 2025

No flag was called on the play, but after reviewing the film, the NFL decided McDuffie’s actions warranted supplemental discipline, which is why the league fined him $11,593 for unnecessary roughness (facemask) on Saturday. —Michael Gallagher, MSNBC Newsweek, 30 Nov. 2025

Word History

Etymology

supplement entry 1 + -al entry 1

First Known Use

1605, in the meaning defined at sense 1

Rhymes for supplemental

• accidental
• compartmental
• continental
• detrimental
• elemental
• fundamental
• governmental
• incidental
• incremental
• instrumental
• interdental
• monumental

Medical Definition

supplemental

adjective

sup·​ple·​men·​tal ˌsəp-lə-ˈment-ᵊl 

: serving to supplement : supplementary

Legal Definition

supplemental

adjective

sup·​ple·​men·​tal ˌsə-plə-ˈment-ᵊl 

: serving to complete or make an addition

supplemental appropriations

specifically : of, relating to, or being a supplemental pleading

supplemental noun