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decade

[ dek-eyd; British also duh-keyd ]
/ ˈdɛk eɪd; British also dəˈkeɪd /
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noun

a period of ten years: the three decades from 1776 to 1806.
a period of ten years beginning with a year whose last digit is zero: the decade of the 1980s.
a group, set, or series of ten.

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Origin of decade

1425–75; late Middle English <Middle French <Late Latin decad- (stem of decas) <Greek dekad- (stem of dekás) group of ten, equivalent to dék(a) ten + -ad--ade2
half-decade, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for decade

decade
/ (ˈdɛkeɪd, dɪˈkeɪd) /

noun

a period of ten consecutive years
a group or series of ten
decadal, adjective
C15: from Old French, from Late Latin decad-, decas, from Greek dekas, from deka ten
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
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