I. ˈmi-lə-ˌner-ē, mə-ˈle-nə-rē noun
( plural -ries )
Etymology: Late Latin millenarium, from neuter of millenarius of a thousand, from Latin milleni one thousand each, from mille
Date: 1550
1.
a. : a group of 1000 units or things
b. : 1000 years : millennium
2. : millenarian
II. adjective
Etymology: Latin millenarius
Date: 1577
1. : suggesting a millennium
2. : relating to or consisting of 1000