1. relating to or consisting of a thousand
Usage: formal
2. relating to a millennium or period of a thousand years
Usage: formal

1. a period of a thousand years; a millennium
Usage: formal
2. a thousandth anniversary
Usage: formal

Examples

• The millenary celebration marked a thousand years since the city’s founding.
• Historians studied the millenary cycles of ancient civilizations.
• The church planned special events for its millenary anniversary.
• The millenary traditions have been passed down through countless generations.
• Scholars debated the significance of the millenary period in medieval history.
• The millenary milestone represented an extraordinary achievement for the institution.