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Webster 1913 Edition
Triennially
Tri-en′ni-al-ly
,adv.
Once in three years.
Webster 1828 Edition
Triennially
TRIEN'NIALLY
,adv.
Definition 2024
triennially
triennially
English
Adverb
triennially (not comparable)
- Occurring at intervals three years apart.
Usage notes
- Often confused with triannually which means occurring three times per year.