Meanings
proper noun
- businessA set of techniques and tools for process improvement.
Origin
A reference to the fraction of a normal curve that lies within six standard deviations of the mean, used to represent a defect rate.
Full word history & related roots →Cite this entry
APA
Six Sigma. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Six%20Sigma
MLA
“Six Sigma.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Six%20Sigma. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “Six Sigma,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Six%20Sigma.
Source: Six Sigma on Wiktionary, CC BY-SA 4.0.