decades

Noun

decade (plural decades)

1. A group, set, or series of ten , particularly
   • a decade of soldiers
2. A period of ten years , particularly such a period beginning with a year ending in 0 and ending with a year ending in 9.
   • The 1960s was a turbulent decade.

   Synonyms:

   decennium, decennary, decenniad, decennial

3. A period of ten days, particularly those in the ancient Egyptian, Coptic, and French Revolutionary calendars.
   • The year was divided up into twelve months renamed after the seasons [...]; each month comprised three ‘decades’ of ten days – with the décadi replacing Sundays as a day of rest; and each day was reconsecrated to a natural product or farming tool or technique.2002, Colin Jones, The Great Nation, Penguin, published 2003, page 481
4. (archaic, literary) A work in ten parts or books, particularly such divisions of Livy's History of Rome.
5. A series of prayers counted on a rosary, typically consisting of an Our Father, followed by ten Hail Marys, and concluding with a Glory Be and sometimes the Fatima Prayer.
6. Any of the sets of ten sequential braille characters with predictable patterns.

See all 9 meanings of decade