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

The league also took a hard, public stance in the Brendan Sorsby situation by denying the former Texas Tech quarterback entry to the supplemental draft. — Saad Yousuf, New York Times, 9 Sep. 2026

If root rot is the culprit, amend the soil to improve drainage and cut back on supplemental watering. — The Spruce, 8 Sep. 2026

Plus, one of the Legislature’s last acts last week was to send Newsom a bloated supplemental budget bill containing more than $3 billion in spending, including countless stacks of pork sought by lawmakers for their districts. — Los Angeles Times, 7 Sep. 2026

These rejections include supplemental health benefits, a night shift differential, geographic pay differential, a recruitment and retention proposal, seniority differential and overtime meal benefits, according to the complaint. — Corey Schmidt, Sacbee.com, 7 Sep. 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