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Definition of lens noun from the Oxford Advanced Learner's Dictionary

lens

noun
 
/lenz/
 
/lenz/
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  1. a curved piece of glass or plastic that makes things look larger, smaller or clearer when you look through it
    • a pair of glasses with tinted lenses
    Extra Examples
    • Put your hand in front of your right lens and just look through your left lens.
    • She wears glasses with very thick lenses.
    Oxford Collocations Dictionaryadjective
    • strong
    • thick
    • coloured/​colored
    lens + noun
    • cap
    • cover
    preposition
    • through a/​the lens
    See full entry
  2. a piece of equipment that is part of a camera, containing one or more lenses
    • a camera with an adjustable lens
    • a view of Mount Kilimanjaro as seen through Eddie's camera lens
    • a lens cap/cover
    • a long-lens shot of a rare bird
    see also fisheye, telephoto lens, wide-angle lens, zoom lens
  3. (informal) a contact lens (= a small round piece of thin plastic that you put on your eye to help you see better)
    • Have you got your lenses in?
  4. (anatomy) the clear part of the eye, behind the pupil, that focuses light so that you can see clearlyTopics Bodyc1
  5. Word Originlate 17th cent.: from Latin, ‘lentil’ (because of the similarity in shape).
See lens in the Oxford Advanced American DictionarySee lens in the Oxford Learner's Dictionary of Academic English
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