Meanings
proper noun
- A modulus-10 checksum algorithm used to validate various identification numbers, such as those on credit cards.
Origin
Created by IBM scientist Hans Peter Luhn.
Full word history & related roots →Cite this entry
APA
Luhn algorithm. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Luhn%20algorithm
MLA
“Luhn algorithm.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Luhn%20algorithm. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “Luhn algorithm,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Luhn%20algorithm.
Source: Luhn algorithm on Wiktionary, CC BY-SA 4.0.