Dictionary

lustrum

lustrum

noun lus·trum \ˈləs-trəm\
plural lustrums or lus·tra \-trə\

Definition of LUSTRUM

1
:  a period of five years
2
a :  a purification of the whole Roman people made in ancient times after the census every five years
b :  the Roman census

Origin of LUSTRUM

Latin
First Known Use: 1590

Browse

Next Word in the Dictionary: lustyPrevious Word in the Dictionary: lustrousAll Words Near: lustrum
March 02, 2015
chatoyant Hear it
Having a changeable luster or color
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears