Meaning of LENS in English

LENS

lens /lenz/ BrE AmE noun [countable]

[ Date: 1600-1700 ; Language: Latin ; Origin: 'lentil' ; because of its shape ]

1 . the part of a camera through which the light travels before it reaches the film:

a standard 50 mm lens

⇨ ↑ telephoto lens , ↑ wide-angle lens , ↑ zoom lens

2 . a piece of curved glass or plastic which makes things look bigger, smaller, or clearer when you look through it:

glasses with powerful lenses

the lens of the microscope

3 . the clear part inside your eye that ↑ focus es so you can see things clearly

4 . a ↑ contact lens

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.