quinquennial

Meanings

1. 1
   adj

   occurring once every five years

   The organization publishes a quinquennial review of its long-term strategy.

2. 2
   adj

   lasting for or relating to a period of five years

   The researchers compared mortality across several quinquennial periods.

3. 3
   noun

   a five-year period, event, or anniversary

   The museum marked its quinquennial with a special exhibition.

Borrowed from Latin quinquennialis, from quinquennium ("five-year period"), itself formed from quinque ("five") + annus ("year"). The related noun quinquennium names the span itself.

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