ankle joint ank·le·joint uncommon noun 1. a gliding joint between the distal ends of the tibia and fibula and the proximal end of the talus Synonymsankleankle jointmortise jointarticulatio talocruralis Related words Broader terms gliding joint Parts leg Part of anklebone WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.