Septennial
- a. Happening or returning once in every seven years; as, septennial elections in England.
- a. Lasting or continuing seven years; as, septennial parliaments.
The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.