<p><strong>Noun</strong></p><ul><li>the state or quality of being opaque.</li><li>something opaque.</li><li>the degree to which a substance is opaque; capacity for being opaque.</li><li>Photography: the proportion of the light that is absorbed by the emulsion on any given area of a film or plate.</li><li>obscurity of meaning.</li><li>mental dullness.</li><li>Medicine/Medical: an opaque spot or area in normally clear or transparent tissue, as a cataract of the eye.</li></ul>