lens Definition in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of “lens” - English Dictionary

Definition of "lens" - American English Dictionary

See all translations

lensnoun [C]

 us   /lenz/

lens noun [C] (GLASS)

a ​piece of ​glass or ​plastic having a ​curvedsurface in ​order to ​change the ​images that are ​received after going through it, usually to make them ​larger, ​smaller, or ​clearer: a ​camera lens Her ​eyeglasses have ​thick lenses.

lens noun [C] (EYE)

a ​curved, ​transparentpart of the ​eye that ​helps you to ​seeclearly by ​directingimages of ​light onto the retina (= the back ​surface of the ​eye)
(Definition of lens from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "lens" - British English Dictionary

See all translations

lensnoun [C]

uk   us   /lenz/

lens noun [C] (GLASS)

a ​curvedpiece of ​glass, ​plastic, or other ​transparentmaterial, used in ​cameras, ​glasses, and ​scientificequipment, that makes ​objectsseemcloser, ​larger, ​smaller, etc.: a ​camera with a ​zoom lens →  contact lens

lens noun [C] (EYE)

the ​part of the ​eye behind the pupil (= the ​blackhole at the ​front of the ​eye) that ​helps you to ​seeclearly by focusing (= ​collecting)light onto the retina
(Definition of lens from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of lens?
Add Cambridge dictionaries to your browser to your website
Word of the Day
faith school

a school that is financially supported by a particular religious group, usually for children from that religion

Word of the Day

Introducing a new author and a new weekly blog post!
Introducing a new author and a new weekly blog post!
by Cambridge Dictionaries Online,
August 27, 2015
The English language is constantly changing. You know that. But did you know that at Cambridge Dictionaries Online we keep track of the changes? We continually add new words and new meanings to our online dictionary for learners of English. Some of them are new to English entirely (neologisms), and some

Read More 

hyperpalatable adjective
hyperpalatable adjective
August 24, 2015
describes food with heightened levels of sugar and salt, intended to be extremely appealing In Brazil, where the prevalence of overweight and obese adults has doubled since 1980, crisps, biscuits, energy bars and sugary drinks formulated to be ‘hyper-palatable’ are much more widely eaten than previously.

Read More