leap second leap out • leapt · · · Info · Definitions · Characters · · leap second · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (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. Synonyms: leap second. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073