ULTRACLEAN Synonyms: 73 Similar and Opposite Words

ultraclean

adjective

Definition of ultraclean

as in spotless

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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 ultraclean In this program, the ESA Web TV crew travel back to Turin, Italy, to talk to the teams and watch as new tests are being conducted with the rover’s Earth twin, Amalia, while the real rover remains carefully stored in an ultraclean room. — IEEE Spectrum, 17 Mar. 2023 They are made on gigantic, ultraclean factory room floors that can be seven stories tall and run the length of four football fields. — New York Times, 8 Apr. 2022 The chalk-size core will be stored in an ultraclean metallic tube, one of 38 samples that the rover eventually collects, with about 30 of those likely to be returned to Earth by later missions. — Paul Voosen, Science | AAAS, 21 July 2021 Recipharm is hiring around 65 workers and training them to work in the ultraclean conditions of its production lines. — Joseph Walker, WSJ, 19 Dec. 2020

Recent Examples of Synonyms for ultraclean

Adjective

The housekeeping staff was incredibly on top of things, and the room always looked spotless.

— Condé Nast, Condé Nast Traveler, 23 Sep. 2026
Over time, that buildup can actually dull the finish and make the whole room feel less clean, even if everything else is spotless.

— Daley Quinn, Southern Living, 17 Sep. 2026

Definition of spotless

Adjective

With more housing near transit comes less reliance on cars, more pedestrian-friendly development, cleaner air and strengthened commercial corridors.

— Bennett Lawson, Chicago Tribune, 2 Oct. 2026
According to advanced fielding metrics, no player in the league made a bigger defensive contribution to his team than the Braves center fielder, an elite defender with a strong arm who takes clean routes to the ball.

— Los Angeles Times, Los Angeles Times, 2 Oct. 2026

Definition of clean

Adjective

His homemaker mother Leonor (a superb Maude Sandham) and his 17-year-old sister Ilse (Karoline Watson) complete the immaculate family portrait, but there’s unrest there too.

— Guy Lodge, Variety, 19 Sep. 2026
Please enjoy every pitch of Payton Tolle's immaculate inning.

— Jen McCaffrey, New York Times, 14 Sep. 2026

Definition of immaculate

Adjective

Earle took one and then laid on a stainless-steel counter, filming a TikTok.

— Elise Taylor, Vanity Fair, 2 Oct. 2026
In the coming weeks, permanent plaza fences will be erected here — curvy stainless-steel structures that MAD Architects principal Dixon Junliang Lu compared to the lacy filigree of Art Nouveau architecture.

— Los Angeles Times, Los Angeles Times, 1 Oct. 2026

Definition of stainless

Adjective

In Lee Cronin’s The Mummy, evil is a native sickness that contaminates an otherwise perfect, unsullied child of empire.

— Literary Hub, Literary Hub, 15 Sep. 2026
But the prosecutor leading the case against the Tates, Rareș Stan, had an unsullied reputation.

— Heidi Blake, New Yorker, 8 June 2026

Definition of unsullied

Adjective

Keep your refrigerator spick-and-span by washing produce drawers with hot water and soap, and spraying all surfaces down with a disinfecting (but non-toxic and food-friendly) vinegar solution.

— Elizabeth Brownfield, Southern Living, 23 Apr. 2026
Watch ships cruise by from the balconies of spick-and-span rooms or while breaking a sweat in the pierside barrel saunas.

— Zoe Baillargeon, Travel + Leisure, 2 Mar. 2026

Definition of spick-and-span

Adjective

Traces of arecoline, a stimulant exclusively found in betel nuts, were present in all the reference samples and in three archaeological samples that came from the unstained teeth of a woman.

— Elizabeth Rayne, ArsTechnica, 19 Aug. 2025
The underlying regular paint should remain undamaged and unstained, although Glasst does advise testing Unpaint in one small area before applying it to a whole wall.

— Ben Coxworth, New Atlas, 10 Sep. 2024

Definition of unstained

Adjective

In other words, historical comparables suggest that Sherwood’s trade value probably isn’t cleanly at the level of him returning a first-round pick to Vancouver if he’s ultimately traded between now and March 6.

— Thomas Drance, New York Times, 6 Jan. 2026
Whoever wins cleanly leaves with both the championship belts.

— Matthew Couden, MSNBC Newsweek, 17 Sep. 2025

Definition of cleanly

Browse Nearby Words

ultrachic

ultraclean

ultracold

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“Ultraclean.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ultraclean. Accessed 5 Oct. 2026.

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Synonyms of ultraclean

adjective

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