1

lens

noun \ ˈlenz \
Updated on: 10 Dec 2017

Definition of lens

1 a : a piece of transparent material (such as glass) that has two opposite regular surfaces either both curved or one curved and the other plane and that is used either singly or combined in an optical instrument for forming an image by focusing rays of light
b : a combination of two or more simple lenses
c : a piece of glass or plastic used (as in safety goggles or sunglasses) to protect the eye
2 : a device for directing or focusing radiation other than light (such as sound waves, radio microwaves, or electrons)
3 : something shaped like a biconvex optical lens
  • lens of sandstone
4 : a highly transparent biconvex lens-shaped or nearly spherical body in the eye that focuses light rays (as upon the retina) — see eye illustration
5 : something that facilitates and influences perception, comprehension, or evaluation
  • viewing the current legal battle … through partisan lenses
  • New Republic

lensed

play \ˈlenzd\ adjective

lensless

play \ˈlenz-ləs\ adjective

Examples of lens in a Sentence

  1. Make sure the lens of the microscope is clean.

Recent Examples of lens from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lens.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of lens

New Latin lent-, lens, from Latin, lentil; from its shape

2

lens

verb

Definition of lens

transitive verb
: to make a motion picture of : film

Recent Examples of lens from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lens.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of lens

1942


Lens

geographical name \ ˈläⁿs \

Definition of Lens

commune in northern France southwest of Lille population 35,032


LENS Defined for English Language Learners

lens

noun

Definition of lens for English Language Learners

  • : a clear curved piece of glass or plastic that is used in eyeglasses, cameras, telescopes, etc., to make things look clearer, smaller, or bigger

  • : the clear part of the eye that focuses light to form clear images


LENS Defined for Kids

lens

noun \ ˈlenz \

Definition of lens for Students

1 : a clear curved piece of material (as glass) used to bend the rays of light to form an image
2 : a clear part of the eye behind the pupil and iris that focuses rays of light on the retina to form clear images

Medical Dictionary

lens

noun
variants: also lense play \ˈlenz\

medical Definition of lens

1 : a curved piece of glass or plastic used singly or combined in eyeglasses or an optical instrument (as a microscope) for forming an image by focusing rays of light
2 : a device for directing or focusing radiation other than light (as sound waves, radio microwaves, or electrons)
3 : a highly transparent biconvex lens-shaped or nearly spherical body in the eye that focuses light rays entering the eye typically onto the retina, lies immediately behind the pupil, is made up of slender curved rod-shaped ectodermal cells in concentric lamellae surrounded by a tenuous mesoblastic capsule, and alters its focal length by becoming more or less spherical in response to the action of the ciliary muscle on a peripheral suspensory ligament

lensed

adjective

lensless

adjective

Illustration of lens



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of very fine texture or delicate form

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