Of the number seven.
Consisting of or forming a group of seven.
A group or set of seven, esp. seven years.
Lasting seven years; continuing seven years.
Origin of septenary
- From the Latin septÄ“nÄrius (“consisting of seven each"), from septÄ“nÄ« (“seven each", “seven at a time") + -Ärius (whence the English suffix -ary).