# Decimal definition

dĕsə-məl
Frequency:
Of or based on the number 10; progressing by tens.
Expressed or expressible as a decimal.
Numbered or ordered by groups of 10.
A fraction with an unwritten denominator of 10 or some power of 10, indicated by a point (decimal point) before the numerator (Ex.: .5 =510)
noun
Any number written using a decimal point.
noun
A representation of a real number using the base ten and decimal notation, such as 201.4, 3.89, or 0.0006.
A decimal fraction.
Decimal is defined as a system of numbers or currency where everything is based on the number ten, or on parts of ten.

3.432 is an example of a number described as a decimal number.

The definition of a decimal is a number written with a decimal point and a remainder that represents portions of ten.

An example of a decimal is 2.5 which is two and five tenths.

noun
A number written using the base 10.
noun
A linear array of digits that contains a single period, called the decimal point, is possibly preceded by a minus sign (−), and represents a real number, with each successive digit to the right of the decimal point indicating a multiple of the next negative power of 10, and each successive digit to the left of the decimal point indicating a multiple of the next non-negative power of ten, beginning with 100 = 1. For example, 245.3 represents the real number (2 × 102 ) + (4 × 101 ) + (5 × 100 ) + (3 × 10−1 ) = 200 + 40 + 5 +310 , and −1.04 represents the real number (−1 × 100 ) + (−4 × 10−2 ).
noun
Such an array of digits in which there are no nonzero digits to the left of the decimal point, representing a real number between −1 and 1.
noun
Based on 10.
(arithmetic, computing, uncountable) The number system that uses the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
noun
(countable) A number expressed in this system.
noun
(informal) A decimal place.

Pi has a value of 3.141, to three decimals.

noun
(informal) A numeral written as a concatenation of successive negative powers of the base.
noun
(informal) A decimal point.
noun
(arithmetic, computing) Concerning numbers expressed in decimal or mathematical calculations performed using decimal.

Singular:
decimal
Plural:
decimals

## Origin of decimal

• Medieval Latin decimālis of tenths or tithes from Latin decima a tenth part or tithe from decem ten dekm̥ in Indo-European roots

### From American Heritage Dictionary of the English Language, 5th Edition

• From Medieval Latin decimalis, from Latin decimus, from decem, ten + adjective suffix -alis