noun
affidavit
a-fih-DAY-viht
noun
1
A written statement made under oath, used as evidence in legal matters.
"She signed an affidavit confirming she witnessed the accident."
"The lawyer submitted several affidavits to support the case."
How to Use Affidavit
Learner’s notesIn plain EnglishA formal, signed, sworn statement used as legal proof.
Common mistake
Not the same word family as "affirm," even though they look similar.
Common pairings
sign an affidavit
submit an affidavit
Word Forms
affidavited past tense, affidavits plural, affidavits singular
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “affidavit”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
She signed an _____ confirming she witnessed the accident.
Etymology
From Medieval Latin affidavit, literally "he/she has sworn" — related to fidelity and faith, though not to the word "affirm," which comes from a different Latin root.