ultra vires ult·ra·vi·res uncommon adjective (1) adverb (1) adjective 1. beyond the legal power or authority of a person or official or body etc “an ultra vires contract” Synonymsultra vires Antonymsintra vires adverb 1. beyond the scope or in excess of legal power or authority Synonymsultra vires WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
