Definition of sexennial in English:

sexennial

adjective

  • 1Recurring every six years.

    • ‘The country has absolutely no continuity except in its sexennial collapse.’
    • ‘The pond is at the height of its glory during the sexennial festival when the reflection of a hundred thousand lights around the temple provides a grand spectacle.’
    • ‘The last sexennial report (25 C/37) was submitted to the General Conference at its twenty-fifth session in 1988 and, after considering it, the General Conference adopted resolution 15.213.’
    1. 1.1 Lasting for or relating to a period of six years.

Origin

Mid 17th century: from sexennium + -al.

Pronunciation:

sexennial

/sekˈsenēəl/