Definition of ankylosis in English:



  • [mass noun] Abnormal stiffening and immobility of a joint due to fusion of the bones.

    • ‘Spondylitis means inflammation of the spine, and ankylosis means that a joint has become fixed solid so that it cannot bend.’
    • ‘Pain relief and frequent passive movements prevent contractures and joint ankylosis.’
    • ‘Only erosive osteoarthritis has erosions and ankylosis.’
    • ‘X-rays taken on March 20 showed that Peltier suffered from ankylosis on both sides of his mandible, meaning that his jaw was completely frozen and immobile.’
    • ‘This condition, known as TMJ ankylosis, needs to be identified and corrected in childhood to restore jaw function and facial harmony.’
    • ‘There was ankylosis of both sacroiliac joints.’


Early 18th century: from Greek ankulōsis, from ankuloun to crook, from ankulos crooked.