Dictionary.com
Thesaurus.com
Synonyms

opaque

American  
[oh-peyk] / oʊˈpeɪk /

adjective

  1. not transparent or translucent; impenetrable to light; not allowing light to pass through.

    Synonyms:
    muddy, cloudy, murky
  2. not transmitting radiation, sound, heat, etc.

  3. not shining or bright; dark; dull.

  4. hard to understand; not clear or lucid; obscure.

    The problem remains opaque despite explanations.

  5. dull, stupid, or unintelligent.


noun

  1. something that is opaque.

  2. Photography. a coloring matter, usually black or red, used to render part of a negative opaque.

verb (used with object)

opaqued, opaquing
  1. Photography. to cover up blemishes on (a negative), especially for making a printing plate.

  2. to cause to become opaque.

opaque British  
/ əʊˈpeɪk /

adjective

  1. not transmitting light; not transparent or translucent

  2. not reflecting light; lacking lustre or shine; dull

  3. not transmitting radiant energy, such as electromagnetic or corpuscular radiation, or sound

  4. hard to understand; unintelligible

  5. unintelligent; dense

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. photog an opaque pigment used to block out particular areas on a negative

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to make opaque

  2. photog to block out particular areas, such as blemishes, on (a negative), using an opaque

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
opaque Scientific  
/ ō-pāk /
  1. Resistant to the transmission of certain kinds of radiation, usually light. Metals and many minerals are opaque to light, while being transparent to radio waves and neutrinos.

  2. Compare translucent transparent


Other Word Forms

  • opaquely adverb
  • opaqueness noun
  • subopaque adjective
  • subopaquely adverb
  • subopaqueness noun

Etymology

Origin of opaque

First recorded in 1375–1425; late Middle English opake, from Latin opācus “shaded”

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The inner workings of cartels are intentionally opaque to the outside world.

From Los Angeles Times

County officials say they need a judge’s permission to comply with the subpoena and turn over the firm’s records to the bar, giving the typically opaque proceedings a spotlight in open court.

From Los Angeles Times

Leverage in the private-credit ecosystem, while limited relative to institutions like banks, exists in complex and opaque layers.

From MarketWatch

His stories often follow financial flows into some of the most opaque corners of the global economy.

From The Wall Street Journal

The Wasserman drama highlights the opaque nature of the committee, said Dempsey.

From Los Angeles Times