vambraceEnglishOxford New American Dictionaryvambrace /ˈvambrās, ˈvæmbreɪs / ▸ noun historical a piece of armor for the arm, especially the forearm. – ORIGIN Middle English : from an Anglo-Norman French shortening of Old French avantbras, from avant ‘before’ + bras ‘arm’. Compare with vamplate.