The difference between Opaque and Transparent

When used as adjectives, opaque means neither reflecting nor emitting light, whereas transparent means see-through, clear.

Opaque is also noun with the meaning: an area of darkness.

Opaque is also verb with the meaning: to make, render (more) opaque.

check bellow for the other definitions of Opaque and Transparent

Opaque as an adjective:

Neither reflecting nor emitting light.
Opaque as an adjective:

Allowing little light to pass through, not translucent or transparent.
Opaque as an adjective (figuratively):

Unclear, unintelligible, hard to get or explain the meaning of
Opaque as an adjective (figuratively):

Obtuse, stupid.
Opaque as an adjective (computing):

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.

Opaque as a noun (obsolete, poetic):

An area of darkness; a place or region with no light.
Opaque as a noun:

Something which is opaque rather than translucent.

Transparent as an adjective (of a material or object):

See-through, clear; having the property that light passes through it almost undisturbed, such that one can see through it clearly.

Examples:

"The waters of the lake were transparent until the factory dumped waste there."
Transparent as an adjective (of a system or organization):

Open, public; having the property that theories and practices are publicly visible, thereby reducing the chance of corruption.
Transparent as an adjective:

Obvious; readily apparent; easy to see or understand.

Examples:

"His reasons for the decision were transparent."
Transparent as an adjective (signal processing):

Having the property of transparency, i.e. sufficiently accurate that the compressed result is perceptually indistinguishable from the uncompressed input.