Opacity

Pronunciation

• US enPR: ōpăsʹĭti, IPA: /oʊˈpæsɪti/

Origin

From French opacité.

Full definition of opacity

Noun

1. (uncountable) The state or quality of being opaque, not allowing light to pass throughWe could not see the sandbar due to the opacity of the muddy water.
2. (uncountable) The state or quality of being inaccessible to understandingThe opacity of these decisions is troubling.
3. (optics, countable) A measure of relative impenetrability to electromagnetic radiation such as light.The opacity of a clean glass window is near zero.

Synonyms

• opaqueness

Coordinate terms

• transparency