Definition of knock knees in US English:

knock knees

plural noun

  • A condition in which the legs curve inward so that the feet are apart when the knees are touching.

    • ‘Inadequate bone formation leads to bending in weight-bearing bones, giving rise to bow legs and knock knees.’
    • ‘Most kids show a moderate tendency toward knock knees between the ages of 4 and 6, as the body goes through a natural alignment shift.’
    • ‘This could be due to joint deformities like bow legs and knock knees, which produce a misalignment and overload on one half of the joint.’


knock knees

/ˈnɑk ˌniz//ˈnäk ˌnēz/