Octennially

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Octennial \Oc*ten"ni*al\, a. [L. octennium a period of eight
     years; octo eight + annus year.]
     Happening every eighth year; also, lasting a period of eight
     years. --Johnson. -- {Oc*ten"ni*al*ly}, adv.
     [1913 Webster]