- another of the time, as assessed by an atomic clock, included with or omitted from official timekeeping systems annually to compensate for changes in the rotation for the planet.
- a moment period put into the season sporadically to pay for difference when you look at the rate of world's rotation in accordance with the absolute standards period.
- a second (as calculated by an atomic time clock) added to or subtracted from Greenwich Mean Time being make up for slowing in the Earth's rotation
Hypernym for "leap second"
Etymologically Related for "leap second"