decennium Meaning, Definition & Usage

  1. noun a period of 10 years
    decennary; decade.

WordNet

De*cen"ni*um noun
Etymology
L.
Wordforms
plural Decenniums L Decennia
Definitions
  1. A period of ten years. "The present decennium." Hallam. "The last decennium of Chaucer's life." A. W. Ward.

Webster 1913