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Definition of opaque adjective from the Oxford Advanced Learner's Dictionary

opaque

adjective
 
/əʊˈpeɪk/
 
/əʊˈpeɪk/
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  1. (of glass, liquid, etc.) not clear enough to see through or allow light through
    • opaque glass
    • opaque tights
    Extra Examples
    • As the lens becomes more opaque, the patient notices a reduction in vision.
    • The windows were nearly opaque with grime.
    • These crystals are completely opaque and nearly black.
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • become
    adverb
    • completely
    • almost
    • nearly
    preposition
    • with
    See full entry
  2. (of speech or writing) difficult to understand; not clear synonym impenetrable
    • The jargon in his talk was opaque to me.
    Extra Examples
    • Both question and answer are rather opaque.
    • The complex administrative arrangements mean that the decision-making process remains somewhat opaque.
    • The system is completely opaque to non-specialists.
    Oxford Collocations Dictionaryverbs
    • be
    • become
    • remain
    adverb
    • extremely
    • fairly
    • very
    See full entry
  3. opposite transparent
    Word Originlate Middle English opake, from Latin opacus ‘darkened’. The current spelling (rare before the 19th cent.) has been influenced by the French form.
See opaque in the Oxford Advanced American DictionarySee opaque in the Oxford Learner's Dictionary of Academic English
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adjective
 
 
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