Definition of opacity
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 of opacity from the Web
The opacity of the central woman’s identity, though, feels obfuscatory rather than interestingly mysterious, and much of the male-female partnering is dominated by upside-down swirling lifts that are at first breathtaking, later oddly routine.
Lucidity and opacity, ordinary delights and exotic peculiarities blend breezily in an intimate jest of vast wonder.
The law itself has become a vessel for everything people dislike about the U.S. health-care system, including and especially problems that long predated the law: high prices, complexity, opacity, uncertainty.
Because of the opacity of the supply chain, the risks are higher than any of us would like.
But Facebook’s opacity can leave big slippery-slope questions to linger.
The collection will feature rich new colors with an opacity equal to that of their liquid lipsticks.
The Port shrugs, shrouds itself in silence and opacity, and answers to no one but its stewards, the governors of New York and New Jersey.
This opacity would have been impossible to imagine in previous eras.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'opacity'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of opacity
Middle French opacité shadiness, from Latin opacitat-, opacitas, from opacus shaded, dark
First Known Use: 1575
OPACITY Defined for English Language Learners
Definition of opacity for English Language Learners
: the quality of a material that does not allow light to pass through it : the quality of being opaque
: the quality of being difficult to understand or explain
Medical Definition of opacity
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)
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