day one

noun

Definition of day onenext
as in beginning
the point at which something begins since day one of this project, we've always insisted that we would create the best product possible without any consideration of cost

Synonyms & Similar Words

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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 day one Tish Cyrus-Purcell Tish Cyrus has been her daughter Miley’s supporter since day one. — Bailey Bujnosek, InStyle, 28 Aug. 2026 Private personal training One-on-one coaching built around your goals, from day one through day sixty. — Sponsored Content, Baltimore Sun, 25 Aug. 2026 The Orioles started the day one game out but tied with the Twins behind three teams. — ABC News, 23 Aug. 2026 And, from day one, the priority has been on working to instil that philosophy. — Paul Taylor, New York Times, 21 Aug. 2026 See All Example Sentences for day one
Recent Examples of Synonyms for day one
  1. beginning
  2. start
  3. inception
  4. commencement
  5. alpha
  6. onset
  7. launch
Noun
  • The question that matters most A famous name should be the beginning of the conversation, not the end of it.
    — Jason St. Angelo, USA Today, 1 Sep. 2026
  • The new findings indicate that last year’s increases were a momentary surge, rather than the beginning of a positive trend.
    — Carly Thomas, HollywoodReporter, 1 Sep. 2026
Definition of beginning
Noun
  • Before last year’s 2-0 start, Taylor went 1-11 during the first two weeks of the season as a head coach.
    — Paul Dehner Jr, New York Times, 8 Sep. 2026
Definition of start
Noun
  • The selection committee has included at least one representative for each team/market since the Hall’s inception in 1963, with an increasing number of at-large selectors more recently.
    — Mike Sando, New York Times, 4 Sep. 2026
  • McKenna took over the role in 2025 from Charles Mesure, who played the former World Security Bureau boss and intelligence operative since the character's 2023 inception.
    — Taijuan Moorman, USA Today, 2 Sep. 2026
Definition of inception
Noun
  • Graduates leave Gas South Arena during Emory University's commencement ceremony in 2024.
    — Zachary Hansen, AJC.com, 3 Sep. 2026
  • Graduates at the University of Arizona and University of Central Florida booed mentions of AI during commencement speeches last spring.
    — Lisa Eadicicco, CNN Money, 2 Sep. 2026
Definition of commencement
Noun
  • Alpha-gal syndrome occurs when a tick bite triggers an immune reaction to a molecule called galactose-α-1,3-galactose (long for alpha-gal) that’s found in food products like beef, pork, dairy, and, separately, tick saliva.
    — Theresa Gaffney, STAT, 2 Sep. 2026
  • With each member bringing her own distinct charm and personality, Hearts2Hearts looks set to further establish themselves as icons of the Z-alpha generation.
    — Billboard Japan, Billboard, 30 Aug. 2026
Definition of alpha
Noun
  • At the onset of summer season the airport similarly saw a decline in its passenger forecast amid rising energy prices.
    — DJ Simmons, Charlotte Observer, 2 Sep. 2026
  • At its onset, the school president had asked people to embrace those within their proximity.
    — Sam McDowell, Kansas City Star, 30 Aug. 2026
Definition of onset
Noun
  • The team had to remove the component, transport it to California, and prepare it for its return to an active launch facility.
    — Aamir Khollam, Interesting Engineering, 5 Sep. 2026
  • Meta's $18 billion social media settlement lifts a legal overhang that some analysts said could clear the way for a wave of new AI product launches.
    — Kai Nicol-Schwarz, CNBC, 4 Sep. 2026
Definition of launch

Browse Nearby Words

day nursery
day one
day ones
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Cite this Entry

“Day one.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/day%20one. Accessed 8 Sep. 2026.

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