Meaning of the word decennary in English

What does decennary mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

decennary

US /dɪˈsɛnəri/
UK /dɪˈsɛnəri/

Noun

a period of ten years; a decade

Example:
The company celebrated its fifth decennary last year.
He has been working on this project for a whole decennary.