opacity.
The state or quality of being opaque, not allowing light to pass through.
Meaning & usage
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.
The state or quality of being inaccessible to understanding.
The opacity of these decisions is troubling.
A measure of relative impenetrability to electromagnetic radiation such as light.
The opacity of a clean glass window is near zero.
An opaque area.
Where this word comes from
From opaque + -ity, from French opacité, from Latin opācitās, from opācus.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.