nounplural noun quinquennia/kwɪŋˈkwɛnɪə/ , plural noun quinquenniums

• A specified period of five years.

  ‘Two 4th-cent. writers ascribe to the later emperor Trajan the view that Nero surpassed all other principes for a quinquennium, apparently referring to the first five years.’

  More example sentences

  • ‘In 2003 the second Plant Genome Size Workshop set a goal of estimating a further 1% in the next five years, and a similar target is likely for the following quinquennium.’
  • ‘There was also a new housing programme (as before, concentrating on apartment blocks) which was to contribute 670 million square yards of new floor-space during the quinquennium.’