ultrafine
adjective
ul·tra·fine
ˌəl-trə-ˈfīn 
: fine to an extreme degree: such as
a
: extremely small, thin, or precise
ultrafine dust particles
an ultrafine needle
Color "curves," meanwhile, allow ultrafine adjustments and targeting of color and brightness ranges …—
Alexander Breindel
Alexander Breindel
b
: of extremely high quality
ultrafine wines
Examples of ultrafine in a Sentence
Recent Examples on the Web
For those who don’t know, PM 2.5 consists of ultrafine particles from Industrial pollution, or even woodsmoke, that can get stuck in the lungs and cause respiratory problems.
—John Werner, Forbes.com, 12 May 2025
In recent years, the trend has been moving in the direction of ultrafine eyebrow pencils that mimic the shadows created by individual eyebrow hairs.
—Bestreviews, Chicago Tribune, 7 Mar. 2025
This month, at the design fair Paris Déco Off, the brand is unveiling its latest interiors collection, including new textiles like an ultrafine merino wool and a velvet linen.
—Lindsey Tramuta Roxanne Fequiere Luke Fortney Gisela Williams Megan O’Sullivan, New York Times, 9 Jan. 2025
That’s because a growing body of science shows that fine and ultrafine particles, usually bound to toxic chemicals and heavy metals in wildfire smoke and exhaust, are causing brain injuries in children.
—Debra Hendrickson, WIRED, 4 Jan. 2025
See All Example Sentences for ultrafine
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John Werner, Forbes.com, 12 May 2025
In recent years, the trend has been moving in the direction of ultrafine eyebrow pencils that mimic the shadows created by individual eyebrow hairs.
—Bestreviews, Chicago Tribune, 7 Mar. 2025
This month, at the design fair Paris Déco Off, the brand is unveiling its latest interiors collection, including new textiles like an ultrafine merino wool and a velvet linen.
—Lindsey Tramuta Roxanne Fequiere Luke Fortney Gisela Williams Megan O’Sullivan, New York Times, 9 Jan. 2025
That’s because a growing body of science shows that fine and ultrafine particles, usually bound to toxic chemicals and heavy metals in wildfire smoke and exhaust, are causing brain injuries in children.
—Debra Hendrickson, WIRED, 4 Jan. 2025
See All Example Sentences for ultrafine
Cite this Entry
“Ultrafine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrafine. Accessed 28 May. 2025.
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