Definition of "optical" in English

adjective

1. Of or relating to sight; visual.

   • Strabismus is an optical defect.

2. Designed to assist or enhance sight

   • A microscope is an optical instrument.

3. Of or relating to optics.

   • Refraction is an optical effect.

4. Of or relating to visible light.

   • Optical telescopes don't work when it is cloudy.

5. Incorporating light-sensitive devices.

   • An optical switch opens the door automatically.

noun

1. (film) Any special effect requiring laboratory work on the film.