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WordReference Random House Learner's Dictionary of American English © 2024lens /lɛnz/USA pronunciation n. [countable], pl. lens•es. - Opticsa piece of glass or other transparent substance, curved on one or both surfaces and used in eyeglasses to correct vision problems, or in devices such as microscopes or binoculars to make things appear clearer, closer, or larger.
- Opticsa part of the eye behind the pupil that focuses images on the retina.
- Physicscontact lens.
WordReference Random House Unabridged Dictionary of American English © 2024lens (lenz),USA pronunciation n., pl. lens•es, v. n. - Opticsa piece of transparent substance, usually glass, having two opposite surfaces either both curved or one curved and one plane, used in an optical device in changing the convergence of light rays, as for magnification, or in correcting defects of vision.
- Opticsa combination of such pieces.
- Physicssome analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
- AnatomySee crystalline lens.
- Geologya body of rock or ore that is thick in the middle and thinner toward the edges, similar in shape to a biconvex lens.
v.t. - Cinema, Show Business[Motion Pictures.]to film (a motion picture).
- Neo-Latin, special use of Latin lēns a lentil (from its shape); see lentil
- 1685–95
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