adjective
opaque
oh-PAYK/əʊˈpeɪk/
Not allowing light to pass through.
The opaque panel blocks the flashlight's beam and casts a dark shadow.
Etymology
Latin opacus meant shaded or dark, and English opaque initially described something dark or unlit. The meaning shifted from lacking light to preventing light from passing through.
In context
… it is not transparent it's completely opaque so this feldspar also can be said to have a vitreous luster
More examples
- Store the oil in an opaque container to protect it from light.
- This opaque paint completely covers the bright color underneath.
- Unlike clear glass, an opaque metal sheet lets no light through.
Forms
opaque · more opaque · most opaque
opacity noun — The degree to which something blocks light.
Similar words
- lightproof
- Emphasizes keeping light out, especially to protect sensitive materials.