opacity

Noun
US[oh-pas-uh-tee]/oʊˈpæsəti/4 syllables
Synonyms: opaqueness

Open English WordNet

Noun (3)

  1. the phenomenon of not permitting the passage of electromagnetic radiationOpposite transparenceType of physical phenomenonKinds optical opacity, radiopacity
  2. incomprehensibility resulting from obscurity of meaningSynonyms: opaquenessType of incomprehensibility
  3. the quality of being opaque to a degree; the degree to which something reduces the passage of lightSynonyms: opaquenessOpposite clearnessType of qualityKinds cloudiness, indistinctnessAttribute of opaque
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Webster's Dictionary (1913)

O·pac′i·ty noun

Origin: 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. Joseph Hall

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54

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