1.Definition: (metaphor) a channel through which something can be seen or understood

"The writer is the lens through which history can be seen"

Category: General

2.Definition: a transparent optical device used to converge or diverge transmitted light and to form images

Related Noun(s):lense

Category: Objects

3.Definition: biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina

Category: General

4.Definition: electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons

Category: Objects

5.Definition: genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils

Related Noun(s):genus lens

Category: Plants