1. occurring every four years
2. lasting for four years

1. an event that occurs every four years

Examples

• The Olympics are a quadrennial event held every four years.
• The president serves a quadrennial term in office.
• The university conducts a quadrennial review of its academic programs.
• The World Cup is soccer’s most prestigious quadrennial tournament.
• The committee meets for its quadrennial conference next summer.
• This quadrennial celebration brings together people from around the world.