decade Meaning, Definition & Usage

  1. noun a period of 10 years
    decennary; decennium.
  2. noun the cardinal number that is the sum of nine and one; the base of the decimal system
    10; tenner; ten; X.

WordNet

Dec"ade noun
Etymology
F. décade, L. decas, -adis, fr. Gr. , fr. ten. See Ten.
Definitions
  1. A group or division of ten; esp., a period of ten years; a decennium; as, a decade of years or days; a decade of soldiers; the second decade of Livy. Written also decad.
    During this notable decade of years. Gladstone.

Webster 1913