vicennial

American

[vahy-sen-ee-uhl] / vaɪˈsɛn i əl /

adjective

of or for 20 years.
occurring every 20 years.

vicennial British

/ vɪˈsɛnɪəl /

adjective

occurring every 20 years
relating to or lasting for a period of 20 years

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of vicennial

1730–40; < Latin vīcenni ( um ) twenty-year period ( vīc ( ēnī ) twenty each + -enn ( us ), combining form of annus year + -ium -ium ) + -al ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Adj. five, quinary†, quintuple; fifth; senary†, sextuple; sixth; seventh; septuple; octuple; eighth; ninefold, ninth; tenfold, decimal, denary†, decuple†, tenth; eleventh; duodenary†, duodenal; twelfth; in one's 'teens, thirteenth. vicesimal†, vigesimal; twentieth; twenty-fourth &c. n.; vicenary†, vicennial†. centuple†, centuplicate†, centennial, centenary, centurial†; secular, hundredth; thousandth, &c.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023