decennial

[ dih-sen-ee-uh l ]
/ dɪˈsɛn i əl /

adjective

of or for ten years.
occurring every ten years.

noun

a decennial anniversary.
its celebration.

Origin of decennial

1650–60; < Latin decenni(um) a period of ten years (decenn(is) decennary + -ium -ium) + -al1

Related forms

de·cen·ni·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for decennial

British Dictionary definitions for decennial

decennial

/ (dɪˈsɛnɪəl) /

adjective

lasting for ten years
occurring every ten years

noun

a tenth anniversary or its celebration

Derived Forms

decennially, adverb
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