- a period of ten years; a decade.
Origin of decennium
From Latin, dating back to 1675–85; see origin at decennial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for decennium
We have much need to distinguish century from century and decennium from decennium.
The decennium extending from 1550 to 1560 was the good period of Ivan IV.
These are the only monuments of early typography acknowledged to come within the present decennium.
One or two trifling works on Greek grammar were published by Croke during this decennium.
The second decennium still found him employed chiefly in research, vertebrate and extinct forms absorbing most of his attention.Thomas Henry Huxley; A Sketch Of His Life And Work
P. Chalmers Mitchell
- a less common word for decade (def. 1)
C17: from Latin, from decem ten + annus year