leap year
Plural
leap years
1
a year in every four years that has 366 days instead of 365
- 2020 was a leap year, so it had 366 days instead of the usual 365.
- We celebrate my birthday every leap year on February 29th.
- The next leap year will be in 2024.
- Because it's a leap year, February will have 29 days instead of 28.
- Leap years help to keep our calendar synchronized with the seasons.
Synonyms: