n.
Pronunciation: sep- ' te-n ē - ə l
Function: adjective
Etymology: Late Latin septennium period of seven years, from Latin sept em + -ennium (as in biennium )
Date: 1640
1 : occurring or being done every seven years
2 : consisting of or lasting for seven years
– sep · ten · ni · al · ly \ - ə -l ē \ adverb