Definition of hyperextension in English:

hyperextension

noun

mass noun
  • The forceful extension of a limb or joint beyond its normal limits, either in exercise or therapy or so as to cause injury.

    ‘hyperextension of the neck may occur with a vigorous rugby tackle’
    count noun ‘knee hyperextensions happen a lot in sports’

Pronunciation

hyperextension

/ˌhʌɪpərɪkˈstɛnʃn/