reduction

noun

re·​duc·​tion ri-ˈdək-shən How to pronounce reduction (audio)
1
: the act or process of reducing : the state of being reduced
2
a
: something made by reducing
b
: the amount by which something is reduced
3
[Spanish reducción, from Latin reduction-, reductio] : a South American Indian settlement directed by Jesuit missionaries
4
: meiosis sense 2
specifically : production of the gametic chromosome number in the first meiotic division
reductional
ri-ˈdək-shnəl How to pronounce reduction (audio)
-shə-nᵊl
adjective

Examples of reduction in a Sentence

a drastic reduction in size Many voters want to see some reduction of the deficit. There is a 20 percent reduction on selected items during this sale.
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 most dramatic reduction came for the Honda CR-V, as the vehicle’s hood, mirrors and A-pillars all obstructed a greater portion of the driver’s view over time. Tanya Mohn, Forbes.com, 28 June 2025 The move could result in layoffs and program reductions across several of its schools, the university said in an announcement. Ryan MacAsero, Mercury News, 28 June 2025 Photo-illustration by Newsweek/Getty/Canva Homes for sale on the market are now taking longer to sell, to the point that many sellers are increasingly offering price reductions in order to close a deal. Giulia Carbonaro, MSNBC Newsweek, 28 June 2025 Board president Cameron Bryan stated in a report during Monday night’s meeting that a team from a district budget reduction action committee recommended calling the election to help bring in revenue to offset the deficit without increasing the tax rate. Elizabeth Campbell, Fort Worth Star-Telegram, 27 June 2025 See All Example Sentences for reduction

Word History

Etymology

Middle English reduccion restoration, from Middle French reducion, from Late Latin & Latin; Late Latin reduction-, reductio reduction (in a syllogism), from Latin, restoration, from reducere

First Known Use

15th century, in the meaning defined at sense 1

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

Cite this Entry

“Reduction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reduction. Accessed 2 Jul. 2025.

Kids Definition

reduction

noun
re·​duc·​tion ri-ˈdək-shən How to pronounce reduction (audio)
1
: the act or process of reducing : the state of being reduced
2
a
: something made by reducing
b
: the amount by which something is reduced in price
3
: meiosis
especially : halving of the chromosome number in the reduction division
reductive
-ˈdək-tiv
adjective

Medical Definition

reduction

noun
re·​duc·​tion ri-ˈdək-shən How to pronounce reduction (audio)
1
: the replacement or realignment of a body part in normal position or restoration of a bodily condition to normal
2
: the process of reducing by chemical or electrochemical means
3
: the psychological diminishment of emotion or needs through activity or adjustment
4
: meiosis
specifically : production of the gametic chromosome number in the first meiotic division

More from Merriam-Webster on reduction

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