Opacity

O-pac′i-ty

,

Noun.

[L.

opacitas

: cf. F. opacité.]

1.

The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.

2.

Obscurity; want of clearness.

Bp. Hall.

,

Noun.

[L. opacitas.]

1.

Opakeness; the quality of a body which renders it impervious to the rays of light; want of transparency. Opacity may exist in bodies of any color.

2.

Darkness; obscurity.

opacity ‎(countable and uncountable, plural opacities)

(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.
(uncountable) The state or quality of being inaccessible to understanding
The opacity of these decisions is troubling.
(optics, countable) A measure of relative impenetrability to electromagnetic radiation such as light.
The opacity of a clean glass window is near zero.