積

(1)a quantity obtained by multiplication; "the product of 2 and 3 is 6"

(2)かけ算で得られる数値

(3)the set of elements common to two or more sets; "the set of red hats is the intersection of the set of hats and the set of red things"

(4)2つ以上の集合に共通する要素の集合

(1)the set of red hats is the intersection of the set of hats and the set of red things

(2)赤い帽子の集合は帽子の集合と赤いものの集合の接点である