ポワッソン分布ぶんぷMeanings1nounPoisson distributionmathematics›A discrete probability distribution in statistics, named after Siméon Denis Poisson. Used in mathematics and related fields.ポワッソン分ぶん布ぷは、まれな事じ象しょうの発はっ生せい回かい数すうをモデル化かするのに使つかわれる。The Poisson distribution is used to model the number of occurrences of rare events.