supplemental

adjective

ˌsə-plə-ˈmen-tᵊl How to pronounce supplemental (audio)
Definition of supplementalnext
1
as in auxiliary
available to supply something extra when needed the new program will provide supplemental health insurance to thousands of workers

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in supplementary
related to each other in such a way that one completes the other an astronomer who regards science and religion not as antithetical but as supplemental belief systems

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of supplemental Meanwhile, North Carolina also caps supplemental EC funding at 13% of a district’s student population. — Rebecca Noel, Charlotte Observer, 19 Aug. 2026 In May, the company provided supplemental materials related to operational guidelines for unaccompanied minors and service disruptions. — Chase Hunter, Mercury News, 17 Aug. 2026 Any personal information supplied by an Entrant to the Sponsor will be subject to NPR's Privacy Policy and the supplemental terms of these Official Rules. — August 16, NPR, 16 Aug. 2026 Chicago will move ahead with its full $260 million supplemental pension payment, Mayor Brandon Johnson promised the city’s investors yesterday. — Chicago Tribune, 14 Aug. 2026 See All Example Sentences for supplemental
Recent Examples of Synonyms for supplemental
  1. auxiliary
  2. supplementary
  3. additional
  4. complementary
  5. accessory
  6. peripheral
Adjective
  • New features include more classrooms and science labs, an auxiliary gym, changing rooms, collaborative learning spaces and two gender-neutral restrooms.
    — Mike Danahey, Chicago Tribune, 20 Aug. 2026
  • Robbie Connolly is going to go from auxiliary guitar to lead guitar.
    — Andy Greene, Rolling Stone, 17 Aug. 2026
Definition of auxiliary
Adjective
  • The sleeping surface measures 82 inches (208 cm) long and is widened via slim supplementary cushions to 57 inches (145 cm) at the head by the doors, tapering to 50 inches (127 cm) at the foot between the wheel wells.
    — New Atlas, New Atlas, 18 Aug. 2026
  • In 2024, Purja became the fastest person to summit all 14 of the peaks without supplementary oxygen.
    — Lex Harvey, CNN Money, 31 July 2026
Definition of supplementary
Adjective
  • Someone with gestational hypertension will need more frequent monitoring, which may include home blood pressure measurements, blood and urine tests, and additional monitoring of fetal growth and well-being.
    — Faye Chiu, CNN Money, 21 Aug. 2026
  • Aurora also participated in the DuPage County joint bid to secure additional salt.
    — Steve Zalusky, Chicago Tribune, 21 Aug. 2026
Definition of additional
Adjective
  • Sincerity and audacity are not opposing forces but complementary ones in this space, and for writers, retro programmers, and other film fans who came of age after midnight at the movies, Curry’s impact persists as its own kind of religion.
    — Alison Foreman, IndieWire, 26 Aug. 2026
  • The complementary setup is intended to prevent defenders from being handcuffed and improve the success rate of their outlet passes.
    — Janson Duench, New York Times, 25 Aug. 2026
Definition of complementary
Adjective
  • Each vacation rental unit can only have one agreement at a time, which is intended for properties that may have an accessory dwelling unit, Cortez said.
    — Hema Sivanandam, Mercury News, 20 Aug. 2026
  • Colorado also legalized accessory dwelling units statewide in 2024, letting homeowners build small backyard or garage apartments without needing a special hearing or approval.
    — Solomon Greene, The Conversation, 14 Aug. 2026
Definition of accessory
Adjective
  • In the first incident, Attwell will have had to keep his eyes down on the tackle, which is late and deliberate, and so loses his peripheral vision that might have picked up Munoz breaking into the area.
    — Graham Scott, New York Times, 25 Aug. 2026
  • For Joan and Luis, these activities were not peripheral to their Jewish lives.
    — Laura Yares, The Conversation, 24 Aug. 2026
Definition of peripheral

Browse Nearby Words

supplement
supplemental
supplementary
See all Nearby Words

Cite this Entry

“Supplemental.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supplemental. Accessed 28 Aug. 2026.

Copy Citation
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of cogent

See Definitions and Examples »

Popular in Grammar & Usage

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

What's the difference between 'fascism' and 'socialism'?

Commonly Misspelled Words
See More

Popular in Wordplay

See More

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Even More Words That Sound Like Insults But Aren't

The Words of the Week - Aug. 28

Why do we say 'break a leg'?
See More

Popular

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
alt-684346df967d5
Add A Letter Quiz Pick the letter that goes in the same spot in fou...
See All