1) количественное числительное 2) [математика] мощность множества
1) математика кардинальное число, кардинал 2) математика мощность множества
noun 1. a number (as 1, 5, 15) that is used in simple counting and that indicates how many elements there are in an assemblage — see number table 2. the property that a mathematical set has in common with all sets that can be put in one-to-one correspondence with it
The cardinality of some set.