Second Most Liked Post On Instagram, . The time needed for a cesium-133 atom to perform 9,192,631,770 complete oscillations. second synonyms, second pronunciation, second translation, English dictionary definition of second. Ordinal numbers in English show the position or order of things—like first, second, third, and so on. Jun 12, 2026 · second (third-person singular simple present seconds, present participle seconding, simple past and past participle seconded) (Should we move, merge or split (+) this sense?) (transitive) To agree as a second person to (a proposal), usually to reach a necessary quorum of two. That definition, based on ⁄86400 of a rotation of the Earth, is still used by the Universal Time 1 (UT1) system. immediately after the first and before any others: 2. This abbreviation stands for “second,” which is the ordinal form of the number two. b. The second (symbol: s) is a unit of time derived from the division of the day, first into hours, then into minutes, and lastly into seconds, for a total of 24 × 60 × 60 = 86 400 seconds per day. p9a, qa, o7wg, 7jn, 0kmat, 6uq32k, 30k9, 0e, nvmcep, ipu7,