1. periods of one thousand years; millennia
Usage: formal; rare
2. groups or sets of one thousand things
Usage: formal; rare

Examples

• The historian studied the rise and fall of civilizations across multiple chiliads.
• Ancient prophecies spoke of events that would unfold over several chiliads.
• The library contained chiliads of manuscripts from different eras.
• Geological changes occur slowly over chiliads of years.
• The scholar organized the data into chiliads for easier analysis.
• Religious texts often reference chiliads when discussing divine timescales.