decade

noun9

1. •
   a period covering ten years, often counted from a year ending in zero

   • The 1960s was a turbulent decade.
   • I haven’t seen my cousin in over a decade!
2. •
   A group, set, or series of ten.

   • a decade of soldiers
3. •
   A period of ten days, particularly those in the ancient Egyptian, Coptic, and French Revolutionary calendars.
4. •
   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.
5. •
   Any of the sets of ten sequential braille characters with predictable patterns.
6. •
   A set of ten electronic devices used to represent digits.
7. •
   A set of resistors, capacitors, etc. connected so as to provide even increments between one and ten times a base electrical resistance.
8. •
   The interval between any two quantities having a ratio of 10 to 1.

   • There are decades between 1.8 and 18, between 25 and 250 and between 0.03 and 0.003.
9. •
   (literary, no longer used) A work in ten parts or books, particularly such divisions of Livy's History of Rome.