leap second meaning

UK /liːp ˈsɛkənd/ US /lip ˈsɛkənd/ 3 syllables

leap second (noun): a second (as measured by an atomic clock) added to or subtracted from Greenwich Mean Time in order to compensate for slowing in the Earth's rotation.

Definition of leap second

  1. a second (as measured by an atomic clock) added to or subtracted from Greenwich Mean Time in order to compensate for slowing in the Earth's rotation

    Type of: second

How to pronounce leap second

leap second is pronounced /liːp ˈsɛkənd/ in British English and /lip ˈsɛkənd/ in American English. It has 3 syllables.

More about leap second on Wikipedia.