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
  • The kingdom partially resumed operations at its main airport on Sunday despite damage from earlier attacks, even as the Houthis threatened further strikes.
    — Lee Ying Shan, CNBC, 26 Oct. 2026
  • The project will also improve sewer main capacity by upsizing a parallel line.
    — Randy Moll, Arkansas Online, 26 Oct. 2026
Definition of main
Adjective
  • His 28-yard touchdown reception from Sam Darnold late in the second quarter beat Delane, who had excellent position.
    — Blair Kerkhoff, Kansas City Star, 26 Oct. 2026
  • The biggest key for the Brewers in this game is to see if their bullpen can keep their excellent pitching alive.
    — OutKick, FOXNews.com, 26 Oct. 2026
Definition of excellent
Adjective
  • The Heat used Larsson, Portis, Hardaway and Nikola Jovic as its four primary reserves for the third straight game to start the season.
    — Anthony Chiang, Miami Herald, 25 Oct. 2026
  • One thing most agree on is that the diminishment of competitive seats leads to greater polarization because legislators are only beholden to primary voters.
    — ABC News, ABC News, 24 Oct. 2026
Definition of primary
Adjective
  • L3Harris claims its design can deliver greater range and speed than existing systems.
    — Aamir Khollam, Interesting Engineering, 24 Oct. 2026
  • Tarantino revealed the most personally meaningful piece of casting in a film filled with great performances — including supporting turns by multiple actors (Austin Butler, Mikey Madison, Sydney Sweeney) who have blown up in the seven years since.
    — Jim Hemphill, IndieWire, 24 Oct. 2026
Definition of great
Adjective
  • What readers are saying The conversation explores the complex dynamics between small-scale and industrial agriculture, with a predominant focus on the challenges and implications of each approach.
    — Tamar Haspel, Washington Post, 21 Oct. 2026
  • The predominant method entails producers sealing off the vents, which causes temperatures to rise and slowly subject the birds to death via heatstroke.
    — Kenny Torrella, Vox, 20 Oct. 2026
Definition of predominant
Adjective
  • Bruna is fantastic, and Alison is a wonderful producer with a great eye.
    — Jesse Whittock, Deadline, 20 Oct. 2026
  • It is carefully crafted and wincingly sincere, a wonderful conversion of inversions.
    — Samuel Hyland, Pitchfork, 19 Oct. 2026
Definition of wonderful
Adjective
  • Astaire is the world's foremost exponent of that particular variety of heart throb!
    — David Hajdu, Vanity Fair, 20 Oct. 2026
  • The former is one of the world's foremost entertainment capitals, and the latter has a starving fan base and state-of-the-art venue in Climate Pledge Arena.
    — Matt Calkins OutKick, FOXNews.com, 17 Oct. 2026
Definition of foremost
Adjective
  • The special effects team has done terrific work re-creating his body down to the creature’s fringed lashes.
    — Amy Nicholson, Los Angeles Times, 22 Oct. 2026
  • Even detractors say star Tom Rhys Harries is terrific in his major leading role debut, and praise the film’s use of practical effects.
    — James Hibberd, HollywoodReporter, 21 Oct. 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 28 Oct. 2026.

Copy Citation
Love words? Need even more definitions?

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

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of grotesque

See Definitions and Examples »

Popular in Grammar & Usage

See More

How to Use 'Who' vs. 'Whom'

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

'Affect' vs. 'Effect'

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

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

Popular in Wordplay

See More

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

12 Lovely and Unusual Words for the Natural World

Why do we 'bury the lede?'

'Za' and 9 Other Words to Help You Win at SCRABBLE
See More

Popular

See More

How to Use 'Who' vs. 'Whom'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't
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
different halloween monsters in silhouette
A Monstrous Vocab Quiz Words That Go Bump in the Night
See All