Opacity definition

ō-păsĭ-tē
Frequency:
Opacity is defined as the quality of not letting light pass through, or hard to understand.

An example of something with opacity is a darkened window.

An example of opacity is the Russian language.

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Something opaque, as a spot on the cornea or lens of an eye.
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The quality or state of being opaque.
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Something opaque.
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The state, quality, or degree of being opaque.
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Obscurity; impenetrability.
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Dullness of mind.
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(uncountable) The state or quality of being opaque, not allowing light to pass through.

We could not see the sandbar due to the opacity of the muddy water.

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(uncountable) The state or quality of being inaccessible to understanding.

The opacity of these decisions is troubling.

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(optics, countable) A measure of relative impenetrability to electromagnetic radiation such as light.

The opacity of a clean glass window is near zero.

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Other Word Forms

Noun

Singular:
opacity
Plural:
opacities

Origin of opacity

  • French opacité from Old French from Latin opācitās from opācus dark

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French opacité.

    From Wiktionary