Definition of affidavit noun from the Oxford Advanced Learner's Dictionary

 

affidavit

 noun
noun
BrE BrE//ˌæfəˈdeɪvɪt//
 
; NAmE NAmE//ˌæfəˈdeɪvɪt//
 
(law)
 
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a written statement that you swear is true, and that can be used as evidence in court to make/swear/sign an affidavit They swore affidavits and put further material before the court. Word Origin mid 16th cent.: from medieval Latin, literally ‘he has stated on oath’, from affidare.
See the Oxford Advanced American Dictionary entry: affidavit