LE'AP-YEAR, n. Blissextile, a year containing 366 days; every fourth year, which leaps over a day more than a common year. Thus in common years, if the first day of March is on Monday, the present year, it will, the next year, fall on Tuesday, but in leap-year it will leap to Wednesday; for leap-year contains a day more than a common year, a day being added to the month of February.