adjective. not penetrable by light.
- -proof (English)
- light (English)
- leoht (Old English (ca. 450-1100))
Example sentences of the word lightproof
1. Noun, singular or mass
Place varying shades of the composite resin on the dental tray along with a single-paste lightproof syringe and light-curing gun to harden the resin material.
When properly installed, an astragal can replace poor sealing at the crack with a weathertight, soundproof and lightproof** seal that will hold up under repeated use.