Definition of octennial in English:


Syllabification: oc·ten·ni·al
Pronunciation: /äkˈtenēəl


1Recurring every eight years.
More example sentences
  • But this explanation appears to be inconsistent with the octennial period of the festival.
1.1Lasting for or relating to a period of eight years.
More example sentences
  • The Bill was, it is true, changed from a septennial to an octennial one.


mid 17th century: from late Latin octennium 'period of eight years' + -al.

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be of the opinion; think or suppose