de·​cade | \ˈde-ˌkād, de-ˈkād; especially sense 1b ˈde-kəd\

Definition of decade 

1 : a group or set of 10 his prisoners were divided into decades— William Godwin : such as

a : a period of 10 years has been teaching for over a decade the decade of the twenties

b Roman Catholicism : a division of the rosary that consists primarily of 10 Hail Marys

2 mathematics : a ratio of 10 to 1 : order of magnitude

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Other Words from decade

decadal \ ˈde-​kə-​dᵊl \ adjective

Examples of decade in a Sentence

The war lasted nearly a decade. The bridge was built a decade ago. The decade of the 1920s runs from January 1, 1920 to December 31, 1929. the first decade of the 21st century There have been a lot of changes during the past two decades.
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Recent Examples on the Web

America’s largest overseas military base—is in the final stage of a more than decade-long expansion project. Time, "Inside Camp Humphreys, South Korea: America's Largest Overseas Military Base," 13 July 2018 In fact, just last May, South Georgia Island near Antarctica, which has been plagued by rats for centuries, finished a $13 million, decade-long rat eradication, the largest ever conducted. Jason Daley, Smithsonian, "Coral Reefs Need Fewer Rats and More Bird Poo," 12 July 2018 The decade-long downward trend in carbon dioxide emissions from energy slowed — and has most recently turned upward. Brooks Jackson,, "Trump's Numbers (Second Quarterly Update) | FactCheck," 11 July 2018 Kavanaugh's meetings came as Democrats zeroed in on decade-old call to shield presidents from criminal investigation. Fox News, "FOX NEWS FIRST: Anti-Trump FBI lovebird defies subpoena; Trump slams 'inappropriate' Russia deal at NATO summit," 11 July 2018 Besides representing Daniels, who received a $130,000 payment in exchange for her silence about an alleged decade-old affair with Trump, Avenatti has taken on another clients in recent months with a connection to Trump. John Wagner,, "Stormy Daniels’ lawyer says he might run against Trump in 2020," 5 July 2018 The decades-old Art Institute of Fort Lauderdale, which has trained thousands in applied and creative arts since the 1970s, has stopped accepting students. David Lyons,, "Art Institute of Fort Lauderdale stops accepting new students as parent pares U.S. operations," 3 July 2018 Obama took Biden’s decades-old advice with the nomination of Garland, a centrist judge so well-liked there were no complaints about his qualifications or judicial philosophy, only the timing of his nomination. NBC News, "McConnell went 'nuclear' to confirm Gorsuch. But Democrats changed Senate filibuster rules first.," 28 June 2018 The new agreement for the live, weekly three-hour block, which commences in October 2019, continues the wrestling federation and network's nearly three decade-long relationship. Marisa Guthrie, The Hollywood Reporter, "Fox and WWE Close Five-Year Deal to Bring 'SmackDown' to Network," 26 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'decade.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of decade

15th century, in the meaning defined at sense 1

History and Etymology for decade

Middle English, from Middle French décade, from Late Latin decad-, decas, from Greek dekad-, dekas, from deka — see deca-

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Statistics for decade

Last Updated

6 Nov 2018

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Time Traveler for decade

The first known use of decade was in the 15th century

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More Definitions for decade



English Language Learners Definition of decade

: a period of 10 years; especially : a 10-year period beginning with a year ending in 0


de·​cade | \ˈde-ˌkād, de-ˈkād\

Kids Definition of decade

: a period of ten years

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Comments on decade

What made you want to look up decade? Please tell us where you read or heard it (including the quote, if possible).


to clear from alleged fault or guilt

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