Meanings
noun
- mathematicsThe counterintuitive observation that a random group of people needs to have only 23 members before there is a 50% chance of two of them having the same birthday.
Translations
Finnish syntymäpäiväparadoksi
- syntymäpäiväparadoksimathematical observation
German Geburtstagsparadoxon
- Geburtstagsparadoxonmathematical observation
Portuguese paradoxo do aniversário
- paradoxo do aniversáriomathematical observation
Cite this entry
APA
birthday paradox. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/birthday%20paradox
MLA
“birthday paradox.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/birthday%20paradox. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “birthday paradox,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/birthday%20paradox.
Source: birthday paradox on Wiktionary, CC BY-SA 4.0.