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

Indiana House Bill 1448, authored by Rep. Hal Slager, R-Schererville, addresses issues with supplemental payments that were added into state law during the 2019 session. —Maya Wilkins, Chicago Tribune, 25 Jan. 2025

The toll this took was hardest on women and children, with the supplemental poverty rate for women increasing from 8.7 percent in 2021 to 13.3 percent in 2023. —Gordon G. Chang, Newsweek, 24 Jan. 2025

Explore supplemental insurance plans to fill coverage gaps. —Andrew Rosen, Forbes, 23 Jan. 2025

The supplemental parking permit program for new developments expired at the end of 2024. —Ariane Lange, Sacramento Bee, 22 Jan. 2025

Word History

Etymology

supplement entry 1 + -al entry 1

First Known Use

1605, in the meaning defined at sense 1

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