testify Pronunciation: /ˈtestəfaɪ; ˈtestɪfaɪ/Translate testify | into French | into German | into Italian Spanish translation of testifyvi (-fies, -fying, -fied) [Law] (frml) prestar declaración, testificar* to testify to sth = declarar or testificar* algotestify in other Oxford dictionaries Definition of testify in the British & World English dictionary Definition of testify in the US English dictionary