This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Impenetrable by light; neither transparent nor translucent.

adj. Not reflecting light; having no luster: an opaque finish.

adj. Impenetrable by a form of radiant energy other than visible light: a chemical solution opaque to x-rays.

adj. So obscure as to be unintelligible: "opaque, elusive, minimal meanings” ( John Simon).

adj. Obtuse of mind; dense. See Synonyms at dark.

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

adj. Neither reflecting nor emitting light.

adj. Allowing little light to pass through, not translucent or transparent.

adj. Unclear, unintelligible, hard to get or explain the meaning of

adj. Obtuse, stupid.

adj. Describes a type for which higher-level callers have no knowledge of data values or their representations; all operations are carried out by the type's defined abstract operators.

n. An area of darkness; a place or region with no light.

n. Something which is opaque rather than translucent.

v. To make, render (more) opaque.

adj. Impervious to the rays of light; not transparent.

adj. Obscure; not clear; unintelligible.

n. That which is opaque; opacity.

Shady; dark; hence, obscure.

Impervious to the rays of light; not transparent.

In entomology, having no luster: said of surfaces or colors.

In botany, mostly used in the sense of ‘not shining,’ or ‘dull.’

A similar ware made at Spode, introduced in 1805. Also called feldspar porcelain and ironstone china.

n. Opacity.

To render opaque.

n. Something opaque; specifically, a shade which can be worn over the forehead to protect the eyes from brilliant light.

adj. not clearly understood or expressed

adj. not transmitting or reflecting light or radiant energy; impenetrable to sight

"And now my chains are to be broken; I shall mount above these clouds and opaque airs in which I live, —opaque, though they seem transparent, —and from the heaven of truth I shall see and comprehend my relations."

uncomprehensible    incomprehensible    semiopaque    lightproof    turbid    light-tight    mirky    milklike    glaucous    fogged   

clear    obvious    bright    translucent    brilliant    see-through    transparent   

opaqued    opaques    opaquing   

dull    dark    opaque twist    opaque illuminator    opaque china    translucent   

opaqueness    opaquely    opacity   

obscure    unintelligible    opacity    cloud    blur   

Ache    Blake    Drake    Haik    Jake    Lake    Snake    ache    ake    awake   

translucent    greenish    impenetrable    milky    glassy    luminous    shiny    amber    murky    featureless