leap year

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Definitions from WordNet

Noun leap year has 1 sense

leap year, intercalary year, 366 days, bissextile year - in the Gregorian calendar: any year divisible by 4 except centenary years not divisible by 400
--₁ is a kind of year, twelvemonth, yr

Definitions from the Web

Leap Year

A leap year is a year that contains one extra day, February 29th, in order to keep the calendar year synchronized with the solar year. It occurs in every year that is divisible by 4, except for years that are divisible by 100 but not by 400.

Examples:

Noun:

2020 is a leap year.
I was born in a leap year, so I only celebrate my actual birthday every four years.

Adjective:

Leap year traditions vary in different cultures.
Many people believe that leap year babies possess special qualities.

Verb:

We will need to leap year the dates in the database to account for the extra day.
The government decided to leap year the calendar to align it with astronomical events.