1. plural of decennial; events, celebrations, or publications that occur or are issued every ten years

1. occurring, happening, or celebrated every ten years; lasting for ten years
Usage: formal; often used in academic or institutional contexts

Examples

• The university held decennials to commemorate each ten-year milestone since its founding.
• The decennials publication featured research summaries from the past decade.
• Many institutions schedule decennials reviews of their programs and policies.
• The decennials celebration brought together alumni from across the years.
• Census data is collected at decennials intervals in many countries.
• The museum's decennials exhibitions showcase the most significant acquisitions from each ten-year period.