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Wordnet 3.0

ADJECTIVE (2)

1. not transmitting or reflecting light or radiant energy; impenetrable to sight;
- Example: "opaque windows of the jail"
- Example: "opaque to X-rays"

2. not clearly understood or expressed;
[syn: opaque, unintelligible]



The Collaborative International Dictionary of English v.0.48:

Opaque \O*paque"\, n.
   That which is opaque; opacity. --Young.
   [1913 Webster]


The Collaborative International Dictionary of English v.0.48:

Opaque \O*paque"\, a. [F., fr. L. opacus. Cf. Opacous.]
   [1913 Webster]
   1. Impervious to the rays of light; not transparent; as, an
      opaque substance.
      [1913 Webster]

   2. Obscure; not clear; unintelligible. [Colloq.]
      [1913 Webster]


WordNet (r) 3.0 (2006):

opaque
    adj 1: not transmitting or reflecting light or radiant energy;
           impenetrable to sight; "opaque windows of the jail";
           "opaque to X-rays" [ant: clear]
    2: not clearly understood or expressed [syn: opaque,
       unintelligible]