opacity

noun

opac·​i·​ty ō-ˈpa-sə-tē How to pronounce opacity (audio)
plural opacities
1
a
: obscurity of sense : unintelligibility
b
: the quality or state of being mentally obtuse : dullness
2
: the quality or state of a body that makes it impervious to the rays of light
broadly : the relative capacity of matter to obstruct the transmission of radiant energy
3
: an opaque spot in a normally transparent structure (such as the lens of the eye)

Examples of opacity in a Sentence

the opacity of the glass Critics have noted the opacity of her writing style.
Recent Examples on the Web Nichols pointed to opacity in monitoring emissions, noting the weekly monitoring was not frequent enough. Sarah Lapidus, The Arizona Republic, 2 July 2024 But investors were reminded of how market opacity can trigger extreme volatility when the price of nickel on the London Metal Exchange almost quadrupled over just two days in early 2022, owing to massive short-selling caused in part by a lack of price transparency. Jason Bordoff, Foreign Affairs, 10 Apr. 2023 For the rest of the trip the river had the color and opacity of pea soup. Alec Luhn, Scientific American, 1 Jan. 2024 This opacity worries Brown University psychology professor Jacqueline Nesi, who says that mental health outcomes could hinge on how the labels are applied. Byalexandra Sternlicht, Fortune, 19 June 2024 See all Example Sentences for opacity 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'opacity.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle French opacité shadiness, from Latin opacitat-, opacitas, from opacus shaded, dark

First Known Use

1575, in the meaning defined at sense 1a

Time Traveler
The first known use of opacity was in 1575

Dictionary Entries Near opacity

Cite this Entry

“Opacity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/opacity. Accessed 21 Jul. 2024.

Kids Definition

opacity

noun
opac·​i·​ty ō-ˈpas-ət-ē How to pronounce opacity (audio)
plural opacities
: the quality or state of being opaque

Medical Definition

opacity

noun
opac·​i·​ty ō-ˈpas-ət-ē How to pronounce opacity (audio)
plural opacities
1
: the quality or state of a body that makes it impervious to the rays of light
broadly : the relative capacity of matter to obstruct by absorption or reflection the transmission of radiant energy (as X-rays, infrared radiation, or sound)
2
: an opaque spot in a normally transparent structure (as the lens of the eye)

More from Merriam-Webster on opacity

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