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

About the Program Summer Connections is a free, optional supplemental program for students in kindergarten through 7th grade focused on reading, math, and social-emotional skill-building. —Cbs Chicago Team, CBS News, 17 Apr. 2026

Trackers are a supplemental safety tool and should not replace microchips, which are a permanent form of identification. —Jessie Quinn, USA Today, 17 Apr. 2026

The supplemental budget was engrossed into law on March 18. —Tim Dunn, Boston Herald, 17 Apr. 2026

For example, Medicare Advantage now accepts all ESRD beneficiaries, opening the door for MA plans to offer coordinated kidney care, out-of-pocket caps, and disease-specific supplemental benefits. —Benjamin Kornitzer, Fortune, 16 Apr. 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