lig ‧ a ‧ ment /ˈlɪɡəmənt/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: ligamentum , from ligare 'to tie' ]
a band of strong material in your body, similar to muscle, that joins bones or holds an organ in its place ⇨ tendon :
He tore a ligament in his left knee.
damaged ankle ligaments