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

And while all public school educators receive supplemental pay through the property tax, just how much depends on their tenure. — Max Klaver, Miami Herald, 3 Oct. 2026

The grant will also support tutoring, supplemental instruction, technology upgrades, and mental health activities. — Carole Carlson, Chicago Tribune, 3 Oct. 2026

Developed in partnership with Discovery Education, a cross-curricular supplemental resource, the program equips students with practical clothing repair and customization skills, from sewing a button to patching a hole or tailoring a hem. — Angela Velasquez, Footwear News, 2 Oct. 2026

Last year, Bills joined the DWTS dance troupe, a group of dancers who perform supplemental, non-competitive numbers and are not paired with celebrities. — Mckinley Franklin, HollywoodReporter, 2 Oct. 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