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

In 2022, the District of Columbia established the Early Childhood Educator Pay Equity Fund, providing early childhood educators up to $14,000 in yearly supplemental payments. —Madeline Mitchell, USA Today, 16 Sep. 2025

Providing both a blueprint for success and supplemental funds to other racing venues within the state, the piece of property within rock-throwing distance of the Tennessee state line has helped initiate a renaissance. —Danny Brewer, Forbes.com, 15 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, 15 Sep. 2025

The other aid is the generous use of supplemental oxygen while climbing. —Alex Hutchinson, Outside, 15 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