decimal fraction


: a fraction (such as .25 = ²⁵/₁₀₀ or .025 = ²⁵/₁₀₀₀) or mixed number (such as 3.025 = 3²⁵/₁₀₀₀) in which the denominator is a power of 10 usually expressed by use of the decimal point

Word History

First Known Use

1660, in the meaning defined above

Time Traveler
The first known use of decimal fraction was in 1660

Dictionary Entries Near decimal fraction

Cite this Entry

“Decimal fraction.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2023.

Kids Definition

decimal fraction


More from Merriam-Webster on decimal fraction

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!