supplemental

adjective

sup·​ple·​men·​tal ˌsə-plə-ˈmen-tᵊl 

1

: serving to supplement

2

: nonscheduled

a supplemental airline

supplemental noun

Synonyms

• 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

Poverty among seniors has risen every year since 2020 based on supplemental measures, Census Bureau data show. —Medora Lee, USA Today, 10 Sep. 2025

Census also tracks what’s known as the supplemental poverty measure, which includes non-cash benefits such as food aid. —Nick Lichtenberg, Fortune, 9 Sep. 2025

Other streamers have found their own ways to account for expensive new sports rights, valuing games’ ability to bring in supplemental audiences who have proven likely to stick around. —Jacob Feldman, Sportico.com, 9 Sep. 2025

Fairlead Strategies undertakes no obligation to maintain or update this material based on subsequent information and events or to provide you with any additional or supplemental information or any update to or correction of the information contained herein. —Katie Stockton, CNBC, 8 Sep. 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