Definition

1. Noun:
   • The quality of being opaque; the degree to which something blocks the passage of light: This refers to the physical property of a material that prevents light from passing through it clearly.
   • Obscurity of meaning; the quality of being hard to understand: This refers to a lack of clarity or transparency in language, thought, or expression.
   • The phenomenon of not permitting the passage of electromagnetic radiation: In physics, this extends the concept to include the blocking of other forms of electromagnetic waves, not just visible light.

Examples of Usage

• Physical Quality:
  • The opacity of the frosted glass provided privacy.
  • Scientists measure the opacity of the atmosphere to understand climate.
• Lack of Clarity in Meaning:
  • The opacity of the legal document made it difficult to interpret.
  • Critics pointed out the opacity of the poet's later work.

Advanced Usage

• "Mathematical/Logical Opacity": Used to describe a process or system whose internal workings are not easily understood or decipherable.
  • The algorithm's opacity is a concern for AI ethics.
• "Rhetorical Opacity": A deliberate use of complex or obscure language for stylistic effect.
  • The author's rhetorical opacity demands careful reading.

Variants and Related Words

• Opaque (adj): Not able to be seen through; not transparent. Also used figuratively to mean difficult to understand.
  • The windows were made of opaque glass.
  • His explanation was completely opaque.
• Opacify (verb, technical): To make something opaque.
  • The chemical is used to opacify the polymer.

Synonyms

• Physical: impermeability (to light), cloudiness, murkiness.
• Figurative (Lack of Clarity): obscurity, ambiguity, unintelligibility, incomprehensibility.

Antonyms

• Physical: transparency, clarity, translucency.
• Figurative (Lack of Clarity): clarity, lucidity, transparency, intelligibility.

Related Phrases and Concepts

• "Opacity of the cornea": A medical condition where the cornea of the eye becomes cloudy.
• "Financial opacity": A lack of transparency in financial reporting or corporate governance.
• "Optical opacity": A specific term in physics for the degree to which a material absorbs or scatters light.

Noun

1. the quality of being opaque to a degree; the degree to which something reduces the passage of light
2. incomprehensibility resulting from obscurity of meaning
3. the phenomenon of not permitting the passage of electromagnetic radiation