Definify.com
Definition 2025
aff.
aff.
English
Abbreviation
aff.
- (law) Abbreviation for affidavit.
- (law, archaic) In case citations, abbreviation for affirmed.
- Affair.
- (grammar) Affix.
- Affiliation or affiliated (with).
- (biology) affinis; having affinity with (but not identical to)
Synonyms
- (affirmed): aff'd