Dictionaryquin•quen•ni•alPronunciation: (kwin-kwen'ē-ul, kwing-), [key] —adj. 1. of or lasting for five years. 2. occurring every five years. —n. 1. something that occurs every five years. 2. a fifth anniversary. 3. a five-year term in office. 4. a quinquennium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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