Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “optical”

optical

adjective uk   /ˈɒp.tɪ.kəl/ us    /ˈɑːp-/
relating to light or the ability to see: an optical effect an optical microscopeEyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasersThe qualities of light
optically
adverb uk   /-i/ us  
The qualities of lightEyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
(Definition of optical from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of optical?
Add Cambridge dictionaries to your browser to your website

Definitions of “optical” in other dictionaries

Word of the Day

microbrewery

a small company that makes beer, usually using traditional methods, and often has a restaurant where its beer is served

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More