1. Happening once every 20 years.
2. Existing or lasting for 20 years.
[From Late Latin vīcennium, period of twenty years : Latin vīciēns, twenty times (from vīgintī, twenty; see vicenary) + Latin annus, year; see at- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. occurring every 20 years
2. relating to or lasting for a period of 20 years
[C18: from Late Latin vīcennium period of twenty years, from Latin vīciēs twenty times + -ennium, from annus year]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
vi•cen•ni•al(vaɪˈsɛn i əl)
1. of or for twenty years.
2. occurring every twenty years.
[1730–40; < Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
|Adj.||1.||vicennial - occurring once every 20 years|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.