decimal
- A number expressed in the base-10 numeral system, which uses ten different digits (0 through 9). nounThe number 3.14 is a decimal representing the mathematical constant pi.Decimals are often used to represent fractions in a more readable form, such as 0.5 for one-half.
- Relating to or based on the number ten; expressed in or utilizing a system of numerical notation that has 10 as its base. adjectiveThe decimal system is the standard system for denoting integer and non-integer numbers.In a decimal system, each place represents a power of ten.