Meanings
- alternativeAlternative form of 6-2-1 rule.
Cite this entry
621 rule. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/621%20rule
“621 rule.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/621%20rule. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “621 rule,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/621%20rule.
Source: 621 rule on Wiktionary, CC BY-SA 4.0.