Leap Second

nounverified·updated May 18, 2026

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

Framework senses

1 sense across 1 framework

Wordset Dictionary1 senseview framework →

§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