Definitions

1. adjective

not allowing light to pass through; opaque substances block the passage of light.

“The opaque glass was used to cover the window.”

2. noun

a quality of being difficult to understand or interpret.

“The opaque nature of the joke made it hard for the audience to laugh.”

3. verb

to make something opaque or less transparent.

“The painter opaque the painting to create a more dramatic effect.”