Definitions for

**"Counting numbers"**The natural numbers, or the numbers used to count.

The numbers used to count things; the set of counting numbers is {1, 2, 3, 4, … }. All counting numbers are integers and rational numbers, but not all integers or rational numbers are counting numbers. Also called natural numbers. The counting numbers and 0 are called whole numbers.

The set {1, 2, 3, ...} of all positive whole numbers, also called the natural numbers.