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

Walz's forthcoming supplemental budget proposal will earmark money for that purpose. —Caroline Cummings, CBS News, 10 Mar. 2026

The Broncos, of course, still could and probably will pursue a supplemental piece in free agency or a young receiver in a deep draft. —Luca Evans, Denver Post, 10 Mar. 2026

There are fine dining restaurants in Los Angeles, where ordering the beverage pairing and supplemental courses will easily run up close to a $1,500 tab. —Jenn Harris, Los Angeles Times, 10 Mar. 2026

The Legislature is not in a traditional budgeting year, but lawmakers could look at supplemental budgeting. —Mary Murphy, Twin Cities, 9 Mar. 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