Look up opacity in
Wiktionary, the free dictionary.

Opacity or opaque refers to something difficult to see through or perceive. It can refer to: Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ...

• Opacity (optics), Degree to which light is blocked.
• Opaque context, a linguistic context in which it is not possible to substitute co-referential terms while guaranteeing the preservation of truth values.
• Opaque data, in computer programming, data that can only be manipulated through an external interface

A substance or object that is opaque is neither transparent nor translucent. ... An opaque context is a linguistic context in which it is not possible to substitute co-referential terms while guaranteeing the preservation of truth values. ... Computer programming (often shortened to programming or coding) is the process of writing, testing, and maintaining the source code of computer programs. ...

See also

• Transparency

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