a written statement that you swear is true, and that can be used as evidence in court 宣誓书;宣誓陈述书 to make/swear/sign an affidavit 作书面保证;立宣誓书;签署宣誓书 They swore affidavits and put further material before the court. 他们宣誓作证,并向法庭提交进一步的材料。
Word Originmid 16th cent.: from medieval Latin, literally ‘he has stated on oath’, from affidare.