Definition of sexennium in English:

sexennium

noun

rare
  • A specified period of six years.

    • ‘We have already offered you our first reflections on the theme proposed for the present sexennium.’
    • ‘I am very happy to have an opportunity to contribute to the work of this regional meeting at the midpoint of the 2003-2009 sexennium.’

Origin

Latin, from sex six + annus year.

Pronunciation:

sexennium

/sɛkˈsɛnɪəm/