[sep-ten-ee-uh l]


occurring every seven years.
of or for seven years.


something that occurs every seven years.

Origin of septennial

1630–40; < Late Latin septenni(s) (Latin septuennis) seven years old (sept(em) seven + -enn-, combining form of annus year + -is adj. suffix) + -al1
Related formssep·ten·ni·al·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for septennial

septenary, septemviral, septuple

Examples from the Web for septennial

Historical Examples of septennial

British Dictionary definitions for septennial



occurring every seven years
relating to or lasting seven years
Derived Formsseptennially, adverb

Word Origin for septennial

C17: from Latin septennis, from septem seven + annus a year
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012