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

The regents also approved budget plans for Michigan Medicine, UM-Dearborn, UM-Flint, Athletics, Michigan Housing and supplemental student fees. — Paula Wethington, CBS News, 26 June 2026

Those supplemental pension payments were nearly nixed last year because of the yawning budget gap. — A.d. Quig, Chicago Tribune, 25 June 2026

The list was created once again through Forbes’ partnership with Sprinklr, with supplemental data from LinkedIn. — Slma Shelbayah, Forbes.com, 25 June 2026

To accommodate the surge, nearly 90% of the agency’s light rail fleet was in operation for match day, with supplemental bus service, coordination with BART and Caltrain, and 100 transit ambassadors to assist with navigation. — Ekasha Sikka, Mercury News, 24 June 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