DAY ONE Synonyms: 68 Similar and Opposite Words

day one

noun

Definition of day one

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

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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 Based on Lee Child’s Jack Reacher novels and starring Alan Ritchson, Reacher has had a big audience from day one for Prime Video. — Rick Porter, HollywoodReporter, 28 Sep. 2026 An hour later, fans were still lining up to get autographs, but in the fifth row behind the Sun bench, Diane Camacho, Joann Gallant and Pat Grondin, season ticket holders from day one, were still in their seats. — Dom Amore, Hartford Courant, 25 Sep. 2026 Rather than relying on off-the-shelf software, Nuuly built its entire warehouse management system in-house from day one. — Arthur Zaczkiewicz, Footwear News, 24 Sep. 2026 Driverless ride-hailing will be part of how people move around, and the question that matters over the next several years isn't whether Tesla's first two-seater was ready for prime time on day one. — Michael Khouw, CNBC, 23 Sep. 2026 See All Example Sentences for day one

Recent Examples of Synonyms for day one

Noun

Novelty is also being rewarded, and that is something Abundantia has factored in from the beginning.

— Jesse Whittock, Deadline, 7 Oct. 2026
The cutting edge facade is just the beginning of the sophisticated design of the hotel, both inside and out.

— Condé Nast, Condé Nast Traveler, 6 Oct. 2026

Definition of beginning

Noun

The backstory Since its inception in 1970, IHG’s upper luxury hotel and resort brand has focused on creating a timeless take on modern luxury in its properties while offering intuitive service with an emphasis on innovation.

— Condé Nast, Condé Nast Traveler, 1 Oct. 2026
Matthews has been with the Royals since the franchise’s inception in 1969, called his 8,000th game last week and won the Baseball Hall of Fame’s Ford Frick Award.

— Pete Grathoff, Kansas City Star, 1 Oct. 2026

Definition of inception

Noun

Season 2 ended with Ortega’s Wednesday setting off with her Uncle Fester to rescue Enid from being trapped as an alpha werewolf.

— Jordan Moreau, Variety, 30 Sep. 2026
With 68% rice bran water, alpha-arbutin (a natural antioxidant), and niacinamide, this brightening trio helps fade dark spots and improve overall clarity without harsh exfoliation.

— Kiana Murden, Vogue, 25 Sep. 2026

Definition of alpha

Noun

Onishchenko told the state news agency TASS that the onset of cold weather would likely prevent transmission.

— Tim Lister, CNN Money, 4 Oct. 2026
Piotr Swat | Lightrocket | Getty Images On Friday, BioMarin announced five-year data from a Phase 3 trial for the drugs Pombiliti and Opfolda to treat late-onset Pompe disease, or LOPD.

— Anna Rodin, CNBC, 2 Oct. 2026

Definition of onset

Noun

Thirteen satellites and counting The latest launch also shows how a common spacecraft architecture can support a growing constellation.

— Aamir Khollam, Interesting Engineering, 3 Oct. 2026
An invite-only beta version of the Room418 app will launch this fall ahead of a commercial launch, featuring a slate of licensed horror content.

— Jesse Whittock, Deadline, 2 Oct. 2026

Definition of launch

Browse Nearby Words

day nursery

day one

day ones

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

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Synonyms of day one

noun

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