decennial

[dih-sen-ee-uh l]

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

Related Words for decennial

decimal, decuple, denary, tenfold

Examples from the Web for decennial

Historical Examples of decennial


British Dictionary definitions for decennial

decennial

adjective

lasting for ten years
occurring every ten years

noun

a tenth anniversary or its celebration
Derived Formsdecennially, 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

Word Origin and History for decennial
adj.

1680s, from Latin decennium, from decennis "of 10 years," from decem "ten" (see ten) + annus "year" (see annual). For vowel change, see biennial.

Online Etymology Dictionary, © 2010 Douglas Harper