reduction

noun

re·​duc·​tion ri-ˈdək-shən How to pronounce reduction (audio)
plural reductions
Synonyms of reductionnext
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 Indigenous settlement directed by Jesuit missionaries
4
: meiosis sense 2
specifically : production of the gametic chromosome number in the first meiotic division
reductional 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 White House promoted the work requirements along with a reduction in immigrant participants. Bart Jansen, USA Today, 19 June 2026 Homeowners can claim a homestead exemption on their primary residence for a reduction in their property taxes. Charles Baggarly, Fort Worth Star-Telegram, 18 June 2026 The programs help communities track local air pollution by placing more air monitors in the area, develop their own pollution-reduction plans and fund green projects that replace older diesel vehicles and equipment, such as school buses and heavy-duty trucks, with cleaner options. Chaewon Chung, Sacbee.com, 18 June 2026 Some reduction in status is inevitable. Literary Hub, 18 June 2026 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

Browse Nearby Words

Cite this Entry

“Reduction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reduction. Accessed 19 Jun. 2026.

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

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