v.tr. 1 make (esp. an argument etc.) invalid. 2 remove the validity or force of (a treaty, contract, etc.). invalidation n.
[ med.L invalidare invalidat- (as IN-(1), validus VALID) ]
v.tr. 1 make (esp. an argument etc.) invalid. 2 remove the validity or force of (a treaty, contract, etc.). invalidation n.
[ med.L invalidare invalidat- (as IN-(1), validus VALID) ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012