a) Neither reflecting nor emitting light.
b) Allowing little light to pass through, not translucent or transparent.
2. noun
Something which is opaque rather than translucent.

Through this opaque of Nature and of Soul, / This double night, transmit one pitying ray, / To lighten, and to cheer.

3. verb
To make, render (more) opaque.

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  • opaque — [ ɔpak ] adj. • XIVe; lat. opacus « ombragé, touffu » 1 ♦ Qui s oppose au passage de la lumière. Verre opaque. « Le brouillard qui rendait pesante, opaque et nauséabonde la nuit » ( Maupassant). Collant opaque. ♢ OPAQUE À... : qui s oppose au… …   Encyclopédie Universelle

  • opaque — [ō pāk′] adj. [ME opake < L opacus, shady] 1. not letting light pass through; not transparent or translucent 2. not reflecting light; not shining or lustrous; dull or dark 3. not allowing electricity, heat, etc. to pass through 4. hard to… …   English World dictionary

  • opaque — UK US /əʊˈpeɪk/ adjective ► difficult to understand or know about, especially because things have been intentionally kept secret or made complicated: »Governments have been able to maintain opaque and discriminatory procurement practices.… …   Financial and business terms

  • opaque — OPAQUE. adj. de tout genre. Terme dogmatique. Qui n est pas transparent. Corps opaque. cela est d une matiere opaque …   Dictionnaire de l'Académie française

  • 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] …   The Collaborative International Dictionary of English

  • Opaque — O*paque , n. That which is opaque; opacity. Young. [1913 Webster] …   The Collaborative International Dictionary of English

  • opaque — (adj.) early 15c., opake, from L. opacus shaded, shady, dark, of unknown origin. Spelling influenced after c.1650 by Fr. opaque (c.1500), from the Latin. Figurative use from 1761. Related: Opaquely; opaqueness …   Etymology dictionary

  • opaque — [adj1] clouded, muddy blurred, cloudy, dark, darkened, dim, dirty, dull, dusky, filmy, foggy, frosty, fuliginous, gloomy, hazy, impenetrable, lusterless, misty, muddied, murky, nontranslucent, nontransparent, nubilous, obfuscated, shady, smoky,… …   New thesaurus

  • opaque — ► ADJECTIVE (opaquer, opaquest) 1) not able to be seen through; not transparent. 2) difficult or impossible to understand. ► NOUN Photography ▪ a substance for producing opaque areas on negatives. DERIVATIVES opaquely adverb …   English terms dictionary

  • opaque — I adjective addlebrained, addleheaded, addlepated, ambiguous, asinine, benighted, bewildering, birdbrained, blind, blockish, boeotian, brainless, cloddish, clouded, cloudy, concealed, confused, confusing, cryptic, dark, dense, difficult,… …   Law dictionary

  • opaque — adj. 1 not clear enough to see through VERBS ▪ be, look ▪ become ▪ As the lens becomes more opaque, the patient notices a falling off in vision. ADVERB ▪ com …   Collocations dictionary

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