• synonyms


  1. inward curvature of the legs, causing the knees to knock together in walking.
  2. knock-knees, the knees of a person whose legs have such curvature.
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Origin of knock-knee

First recorded in 1820–30
Related formsknock-kneed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for knock-knee

Historical Examples of knock-knee

British Dictionary definitions for knock-knee


  1. a condition in which the legs are bent inwards causing the knees to touch when standingTechnical name: genu valgum
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Derived Formsknock-kneed, adjective
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

knock-knee in Medicine


  1. A deformity of the legs in which the knees are abnormally close together and the ankles are spread widely apart.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.