noun \ˈde-ˌkād, de-ˈkād; especially sense 1b ˈde-kəd\

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

Full Definition of DECADE

:  a group or set of 10: as
a :  a period of 10 years
b :  a division of the rosary that consists primarily of 10 Hail Marys
:  a ratio of 10 to 1 :  order of magnitude
de·cad·al \ˈde-kə-dəl\ adjective

Examples of DECADE

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

Origin of DECADE

Middle English, from Middle French décade, from Late Latin decad-, decas, from Greek dekad-, dekas, from deka
First Known Use: 15th century

Other Number-Related Terms

jubilee, myriad, quarantine, score, twain


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