Longman Dictionary English Word family noun validity ≠ invalidity adjective valid ≠ invalid verb validate ≠ invalidate From Longman Business Dictionaryvalidityva‧lid‧i‧ty /vəˈlɪdəti/ noun [uncountable] LAWwhen a document is legally acceptableThe shareholder group may question thelegal validity of the merger in court. → face validity ldoceonline.com
