septennial: Meaning and Definition of

sep•ten•ni•al

Pronunciation: (sep-ten'ē-ul), [key]
— adj.
  1. occurring every seven years.
  2. of or for seven years.
—n.
  1. something that occurs every seven years.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.