Definition of opaque

< opalescent

opaque projector >

o·paque    (-pk) KEY 

ADJECTIVE:

1. 1. Impenetrable by light; neither transparent nor translucent.
   2. Not reflecting light; having no luster: an opaque finish.
2. Impenetrable by a form of radiant energy other than visible light: a chemical solution opaque to x-rays.
3. 1. So obscure as to be unintelligible: "opaque, elusive, minimal meanings" (John Simon).
   2. Obtuse of mind; dense. See Synonyms at dark.

NOUN:

Something that is opaque, especially an opaque pigment used to darken parts of a photographic print or negative.

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ETYMOLOGY:
Middle English opake, shady, and French opaque, opaque (from Old French, shady), both from Latin opcus

OTHER FORMS:
o·paquely(Adverb), o·paqueness(Noun)