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Definition of "trifocal" []

  • Having three focal lengths. (adjective)
  • Having one section that corrects for distant vision, a second section that corrects for medium vision, and a third that corrects for near vision, as an eyeglass lens. (adjective)
  • A lens having three focal lengths. (noun)
  • Eyeglasses having trifocal lenses. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "trifocal" in a sentence
  • "The cost, complete with two pairs of progressive (trifocal blended) lenses (one sunglass type) and the frames was around $2500 pesos."
  • "Since I also tend to shoot a rifle with both eyes open, I'm thinking about having a set of lenses made with the right lens the same prescription as the center lens of my trifocal to see the sights clearly and the left lens the same prescription as my top lens for distance."
  • "I just tilt my head up a little to look through the middle lens of the trifocal."
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