Definition of decennial
1 : consisting of or lasting for 10 years
2 : occurring or being done every 10 years the decennial census
decenniallyplay \-nē-ə-lē\ adverb
Recent Examples of decennial from the Web
The law says that no personally identifying information will be given out until 72 years after it is collected for the decennial census.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'decennial'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of decennial
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