cardinality

2. In mathematics, the cardinality of a set is the measure of how many elements it contains, including infinite sets.

The cardinality of the set of natural numbers is infinite.

3. In databases, cardinality refers to the number of distinct values in a column or the uniqueness of data in a relationship.

A column with high cardinality has many unique values, like email addresses.

4. In grammar, cardinality can describe the property of being a cardinal number, such as one, two, or three.

The cardinality of 'three' marks it as a counting number rather than an ordinal like 'third'.