tibial /ˈtɪbi.əl/adjective 2noun 1forms 1 adjective2 •Of or pertaining to a tibia or a structure associated with a tibia.Her anterior cruciate ligament (ACL) and medial collateral ligament (MCL) are torn and Vonn has a lateral fracture of the tibial plateau, the upper end of the tibia or shin bone. — 2013 •Of or relating to a pipe or flute. noun1 •A tibial bone. formstibials