Definition of leap year in English:

leap year

Syllabification: leap year

noun

  • A year, occurring once every four years, that has 366 days including February 29 as an intercalary day.
    More example sentences
    • To compensate for this discrepancy, the leap year is omitted three times every four hundred years.
    • On the advice of a Greek astronomer, Sosigenes, he then [thereafter] started the leap year system.
    • I know leap years are roughly every four years, but I think there are some that aren't like that.

Origin

late Middle English: probably from the fact that feast days after February in such a year fell two days later than in the previous year, rather than one day later as in other years, and could be said to have “leaped” a day.

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