- consisting of or pertaining to a thousand, especially a thousand years.
- pertaining to the millennium.
noun, plural mil·le·nar·ies.
- an aggregate of a thousand.
noun plural -naries
- a sum or aggregate of one thousand, esp one thousand years
- another word for a millennium
- another word for millenarian
adj.“consisting of a thousand,” 1570s, from Latin millenarius (see millennium).