Lasting or continuing seven years; as, septennial parliaments.
Happening or returning once in every seven years; as, septennial elections in England.
Origin of septennial
From Late Latin septenniumperiod of seven yearsfrom Latin septennisof seven yearsseptemsevenseptm̥ in Indo-European roots annusyearat- in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
From Late Latin septennium (“a period of seven years").
Septennial Sentence Examples
But they were reluctant to face an immediate dissolution, and the Septennial Act was passed (1716) to extend to seven.
He was a friend of the Whig leaders Stanhope and Sunderland, took a share in defeating the Jacobite conspiracy of Bolingbroke on the death of Queen Anne, and supported the passing of the Septennial Act.
Also the system of Government and opposition and septennial elections almost ensured instability unless the Government had a huge majority.