WordReference Random House Unabridged Dictionary of American English © 2025
sex•en•ni•al
(sek sen′ē əl),USA pronunciation adj.
sex•en′ni•al•ly, adv.
- of or for six years.
- occurring every six years.
- Latin sexenni(s) six years old (sex six + -enn-, combining form of annus year + -is adjective, adjectival suffix) + -al1
- 1640–50