How to pronounce AFFIDAVIT. How to say AFFIDAVIT.This video shows you How to Pronounce Affidavit, pronunciation guide. A written statement that someone makes after promising officially to tell the truth. An affidavit can be used as proof in a law court. "affidavit". Listen to the audio pronunciation again. Having trouble hearing a pronunciation? Affidavit definition: . See examples of AFFIDAVIT used in a sentence. The term is pronounced as "afuhDAYvit.