number one

adjective

variants also No. 1
Definition of number onenext
1
as in main
coming before all others in importance considers international terrorism to be the number one threat to national security

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in excellent
of the very best kind the company's chocolate is rated as number one by serious chocoholics

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 number one Talked about number one in the country a year ago and some of our championships. — Tom Green | [email protected], al, 15 Mar. 2023 And North Carolina, last year's runner up and this year's preseason number one, missed out entirely. — Taylor Wilson, USA TODAY, 13 Mar. 2023 Depositors and workers in the companies whose deposits are in that bank need to be job number one. — CBS News, 12 Mar. 2023 The number one priority in those situations is the health of the player. — Dalton Ross, EW.com, 2 Mar. 2023 See All Example Sentences for number one
Recent Examples of Synonyms for number one
  1. main
  2. excellent
  3. primary
  4. great
  5. predominant
  6. wonderful
  7. foremost
  8. terrific
Adjective
  • Of the 33 schools awarded grants, 19 schools opted for main entrance improvements while 14 chose to modernize their check-in and visitor badging systems.
    — Michelle Mullins, Chicago Tribune, 5 July 2026
  • India’s main stock index last month outperformed other emerging markets by the most since November, and foreign outflows hit a four-month low.
    — J.D. Capelouto, semafor.com, 5 July 2026
Definition of main
Adjective
  • Rocket is known for its excellent customer service and easy-to-use website and mobile app.
    — Kelsey Neubauer, CNBC, 13 July 2026
  • Bagworm is excellent and I am thrilled Oscilloscope will be bringing this cinematic fever dream to a theater near you.
    — Andreas Wiseman, Deadline, 13 July 2026
Definition of excellent
Adjective
  • Leaving spring training, one of the primary concerns for the Rangers was its bullpen, and halfway through the season this group ranks 10th in MLB.
    — Fort Worth Star-Telegram, Fort Worth Star-Telegram, 14 July 2026
  • The district’s surveillance traps show numbers of Culex mosquitos — the primary vectors of West Nile virus — are at their highest.
    — Alula Alderson, Sacbee.com, 14 July 2026
Definition of primary
Adjective
  • Naturally, minds will go back to 1986, when Argentina beat England 2-1 and Diego Maradona scored arguably the greatest World Cup goal of all-time.
    — Stuart James, New York Times, 12 July 2026
  • And the greatest Golden Boot chase in World Cup history as greats Lionel Messi, Kylian Mbappe, Haaland and Kane rose like giants.
    — Miami Herald, Miami Herald, 12 July 2026
Definition of great
Adjective
  • The Hightower family is closely connected with the worship of the Seven, the predominant faith of Westeros, and Ormund seems to be a model believer.
    — Jackson McHenry, Vulture, 13 July 2026
  • Menus change every few days but always feature fresh, whole, plant-predominant foods.
    — Eve Chen, USA Today, 10 July 2026
Definition of predominant
Adjective
  • The resort provides a hiking guide—Nafea Abdeljalil was wonderful—and of course transport.
    — Condé Nast, Condé Nast Traveler, 9 July 2026
  • Izzy, a vulnerable, dry-humored lesbian, played with a hummingbird intensity by the wonderful Molly Bernard, marvels that the experience is hard to describe to anyone who hasn’t been through it, like sharing a dream.
    — Emily Nussbaum, New Yorker, 9 July 2026
Definition of wonderful
Adjective
  • With Disney serving as popular culture’s foremost purveyor of such retreads, the formula for what makes a live-action remake hit or miss with audiences could hardly seem less formulaic.
    — Chris Lee, Vulture, 14 July 2026
  • Forbes Business Council is the foremost growth and networking organization for business owners and leaders.
    — Radu Magdin, Forbes.com, 10 July 2026
Definition of foremost
Adjective
  • Hargrave then had three terrific seasons in Philadelphia, where Jonathan Gannon — the Packers’ defensive coordinator — was the Eagles’ coordinator for two years.
    — Rob Reischel, Forbes.com, 11 July 2026
  • Kuechly, Rivera and Newton teamed up on the terrific Panthers teams of the 2010s.
    — Scott Fowler July 8, Charlotte Observer, 8 July 2026
Definition of terrific

Browse Nearby Words

numberless
number one
numbers
See all Nearby Words

Cite this Entry

“Number one.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/number%20one. Accessed 15 Jul. 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!

Popular in Grammar & Usage

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

Is that lie 'bald-faced' or 'bold-faced'?

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

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

Commonly Misspelled Words
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

It's a Scorcher! Words for the Summer Heat

The Longest Long Words List

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

14 Phobias You Probably Haven't Heard Of

It's a Scorcher! Words for the Summer Heat
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
banana-mirrored
Contradictory Words Quiz Pick out which word means one thing…and the opp...
See All