lammergeyer lam·mer·geyer UK/ˈlaməɡaɪə/ uncommon noun 1. the largest Eurasian bird of prey; having black feathers hanging around the bill Synonymsbearded vulturelammergeierGypaetus barbatus Related words Broader terms Old World vulture WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved.