Word.ws English Dictionary

decennium

UK/dɪˈsɛnɪəm/

decennium noun: synonym of decade: a ten year period.

Noun

decennium (plural decenniums or decennia)

  1. (rare) Synonym of decade: a ten year period.
    • G.B. still has to cope with the heritage of approx. 20 years of consecutive Conservative reigns, just as you guys are getting your act together after almost a decennium of Enlightened Ronnie.1998, soc.culture.netherlands (Usenet)
    • Christian leaders refused even to *look* through Galileo's telescope (as a matter of fact, the Vatican cleared Galileo's name only as late as in the previous decennium).1996, soc.culture.usa (Usenet)
    Synonyms:
    decade

Synonyms of decennium

Forms of decennium

pluraldecenniums
pluraldecennia

Origin of decennium

From Latin decennium, from decennis (“10-year”) + -ium (suffix forming abstract nouns), from deciēs (“ten times”) + annus (“year”) + -is (suffix forming compound adjectives). Equivalent to decennial + -ium.

Words formed from decennium

Questions about decennium

What does decennium mean?
Decennium means synonym of decade: a ten year period.
What part of speech is decennium?
Decennium is a noun.
How do you pronounce decennium?
Decennium is pronounced /dɪˈsɛnɪəm/ (UK).
What is the plural of decennium?
The plural of decennium is decenniums.

Words near decennium in the dictionary

  1. decenniad
  2. decenniads
  3. decennial
  4. decennially
  5. decennials
  6. decennium
  7. decenniums
  8. decennoval
  9. decenoate
  10. decenoates
  11. decenoic acid

Source and license

Adapted from Wiktionary: decennium (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

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