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

Colorado homeowners were among the least likely in the nation to have purchased supplemental insurance riders (53%), even as wildfires, severe storms, and flooding continue to pose real threats. —Sara B. Hansen, Denver Post, 9 May 2026

Whether Sorsby will petition the NFL to hold a supplemental draft this summer and whether the NFL would agree are unknowns. —Michael McCann, Sportico.com, 6 May 2026

The supplemental appropriation is largely tied to teacher pay increases. —Racquel Bazos, Baltimore Sun, 6 May 2026

For patients who have dense breasts, the ACP encourages doctors to consider supplemental digital breast tomosynthesis (DBT), often called 3D mammography. —Angelica Stabile, FOXNews.com, 6 May 2026

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