Meanings
fn1
plural fns
FN2
FN3
plural FNs
- diminutiveDiminutive of FN Five-seven (the pistol derivative of the FN-FAL)
I know your purse say D and G, holdin' my FN
2020, Moneybagg Yo, Match My Fly
FN4
- abbreviationAbbreviation of Fabrique Nationale de Herstal.
FN5
plural FNs
- abbreviationcountableinitialismuncountableInitialism of fibronectin.
FN6
plural FNs
- abbreviationinitialismInitialism of false negative.
A FN diagnosis, on the other hand, can give a patient the illusion of good health (and the patient will not get the necessary treatment).
2015 July 24, Krzysztof J. Cios, Dat T. Nguyen, “Data mining and data visualization”, in Susan J Henly, editor, Routledge International Handbook of Advanced Quantitative Methods in Nursing Research, Routledge, →ISBN, page 3161 more example
From the optics of fairness, we care more about FPs than FNs because it's more unfair to put an innocent person in prison than it is to leave a guilty person in the streets.
2021 March 26, Serg Masís, Interpretable Machine Learning with Python: Learn to build interpretable high-performance models with hands-on real-world examples, Packt Publishing Ltd, →ISBN, →OCLC, page 291
FN7
Fn8
- alternativeAlternative form of fn (“function”).
Synonyms & antonyms
Origin
Initialism of Fabrique Nationale.
Full word history & related roots →Cite this entry
fn. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/fn
“fn.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fn. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “fn,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/fn.
Source: fn on Wiktionary, CC BY-SA 4.0.