Noun Concept
Categories: Calendars, All articles needing additional references, Articles with short description, Units of time, Types of year
leap year  intercalary year  366 days  bissextile year  Bisextile
A calendar year with an extra day added in February Open English WordNet
A leap year is a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year. Wikipedia
Type of year that has 366 days, instead of 365 for a common year Wikidata
A year with 366 days instead of 365. OmegaWiki
A year with an extra day, a leap year. Wiktionary
A year in the Julian or Gregorian calendars with an intercalary day added to February, used to adjust for the extra hours of the solar year; a 366-day year. Wiktionary