or 20-20

[twen-tee-twen-tee, twuhn-tee-twuhn-tee]
See more synonyms for twenty-twenty on

Origin of twenty-twenty

First recorded in 1935–40 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for twenty-twenty


British Dictionary definitions for twenty-twenty


  1. med (of vision) being of normal acuity: usually written 20/20
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

twenty-twenty in Science


20/20 (twĕn′tē-twĕn)
  1. Having normal visual acuity. A person with twenty-twenty vision can see type as small as one-third of an inch at a distance of twenty feet.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.