Meaning of opacity

o•pac•i•ty

Pronunciation: (ō-pas'i-tē), [key]
— pl. -ties.
  1. the state or quality of being opaque.
  2. something opaque.
  3. the degree to which a substance is opaque; capacity for being opaque.
  4. the proportion of the light that is absorbed by the emulsion on any given area of a film or plate.
  5. obscurity of meaning.
  6. mental dullness.
  7. an opaque spot or area in normally clear or transparent tissue, as a cataract of the eye.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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