supplemental

adjective

sup·​ple·​men·​tal ˌsə-plə-ˈmen-tᵊl 

1

: serving to supplement

2

: nonscheduled

a supplemental airline

supplemental noun

Synonyms

• accessorial
• accessory
• appurtenant
• auxiliary
• peripheral
• supplementary

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

Senate Democrats included $370 million for the MBTA in the supplemental spending bill, far less than the more than $700 million the House wrote in. —Chris Van Buskirk, Boston Herald, 1 May 2025

But this time, the department of player safety did not issue supplemental discipline. —Shayna Goldman, New York Times, 29 Apr. 2025

That's where the air is too thin to support human life without supplemental oxygen. —Ashley J. Dimella, FOXNews.com, 29 Apr. 2025

Tkachuk did not receive supplemental discipline from the league because the hit on Guentzel came after the Lightning forward played the puck and did not involve contact to the head. —Jordan McPherson, Miami Herald, 29 Apr. 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