burning glass

  1. a converging lens used to produce heat or ignite substances by focusing the sun's rays.

Origin of burning glass

First recorded in 1560–70

Words Nearby burning glass

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use burning glass in a sentence

  • I took the precaution, however, to put the burning-glass into my pocket lest we should want fire.

    The Coral Island | R.M. Ballantyne
  • They lack the burning glass of a purpose, to focalize upon one  spot the separate rays of their ability.

    How to Succeed | Orison Swett Marden
  • He was like a great burning glass, concentrating the rays of the sun upon a single spot; he burned a hole wherever he went.

    How to Succeed | Orison Swett Marden
  • To show the action of a burning glass send a beam of light into a darkened room, and place in its path a double convex lens.

    Physics | Willis Eugene Tower
  • That burning glass is what did it, said one more reflective man.

    The Girls of Central High | Gertrude W. Morrison

British Dictionary definitions for burning glass

burning glass

  1. a convex lens for concentrating the sun's rays into a small area to produce heat or fire

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012