anterior UK /anˈtɪə.ɹi.ə/US /ænˈtɪɹ.i.ɚ/ adjective4 •Nearer the forward end, especially in the front of the body; nearer the head or forepart of an animal.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 •Pronounced with an obstruction located in front of the palato-alveolar region of the mouth, e.g. b, p, d, t. •(formal) Coming before or earlier in time or development, prior to, preceding.anterior to the time when mankind have become capable of being improved by free and equal discussion. — 1859 •(of a part of a flower or leaf) Situated further away from the mainstem.