arithmetic

noun

arith·​me·​tic ə-ˈrith-mə-ˌtik How to pronounce arithmetic (audio)
1
a
: a branch of mathematics that deals usually with the nonnegative real numbers including sometimes the transfinite cardinals and with the application of the operations of addition, subtraction, multiplication, and division to them
b
: a treatise on arithmetic
2
arithmetic adjective
or arithmetical
arithmetically adverb
arithmetician noun

Examples of arithmetic in a Sentence

a software program that will do the arithmetic for you I haven't actually done the arithmetic yet, but I suspect we're losing money on the deal.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The time has come for House Speaker Daniel Perez, R-Miami, to face up to the brutal arithmetic that explains how Tallahassee works. Steve Bousquet, Sun Sentinel, 17 May 2025 And of course there’s some other stuff that can do arithmetic better than us. Steven Strogatz, Quanta Magazine, 15 May 2025 That’s in 45 years… Corporate labs are starting to internalize such arithmetic. Cornelia C. Walther, Forbes.com, 12 May 2025 The traditional pillars of education — reading, writing and arithmetic — have not merely been sidelined; they are now regularly diminished as outdated or insufficient in the face of more fashionable trends. William P. Yeakel, Baltimore Sun, 28 Apr. 2025 See All Example Sentences for arithmetic

Word History

Etymology

Middle English arsmetrik, from Anglo-French arismatike, from Latin arithmetica, from Greek arithmētikē, from feminine of arithmētikos arithmetical, from arithmein to count, from arithmos number; akin to Old English rīm number, and perhaps to Greek arariskein to fit

First Known Use

15th century, in the meaning defined at sense 1a

Time Traveler
The first known use of arithmetic was in the 15th century

Cite this Entry

“Arithmetic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arithmetic. Accessed 6 Jun. 2025.

Kids Definition

arithmetic

noun
arith·​me·​tic ə-ˈrith-mə-ˌtik How to pronounce arithmetic (audio)
1
: a branch of mathematics that deals with real numbers and their addition, subtraction, multiplication, and division
2
: an act or method of computing
arithmetic adjective
or arithmetical
arithmetically adverb
arithmetician noun

More from Merriam-Webster on arithmetic

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