1. a period of two thousand years
Usage: formal
2. a two-thousandth anniversary
Usage: formal

1. relating to a period of two thousand years
Usage: formal

Examples

• The bimillenary of Christ’s birth was celebrated worldwide in 2000.
• Historians studied cultural changes across the bimillenary period.
• The city planned special events for its bimillenary celebration.
• Archaeological evidence spans nearly a full bimillenary.
• The bimillenary anniversary marked an important milestone.
• Scholars debated the significance of the bimillenary era.