Definition of ultra vires adverb from the Oxford Advanced Learner's Dictionary

 

ultra vires

 adverb
adverb
BrE BrE//ˌʌltrə ˈvaɪriːz//
 
; NAmE NAmE//ˌʌltrə ˈvaɪriːz//
 
(from Latin, law)
 
jump to other results
beyond your legal power or authority Word OriginLatin, literally ‘beyond the powers’.
See the Oxford Advanced American Dictionary entry: ultra vires