Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of septennial is as below...

Septennial :: Septennial (a.) Happening or returning once in every seven years; as, septennial elections in England..

Septennial :: Septennial (a.) Lasting or continuing seven years; as, septennial parliaments..

Septennially :: Septennially (adv.) Once in seven years.

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