Second - definition of second by The Free Dictionary
https://www.thefreedictionary.com:443/second
WEBDefine second. second synonyms, second pronunciation, second translation, English dictionary definition of second. n. 1. a. A unit of time equal to one sixtieth of a minute. b. The time needed for a cesium-133 atom to perform 9,192,631,770 complete oscillations.
DA: 42 PA: 76 MOZ Rank: 85