second The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of U ...

is the base unit of time in the International System of Units (SI). Second, Seconds, The Second, or (The) 2nd may also refer to:

Mathematics

2 (number) 2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and the only even prime number. Because it forms the basis of a duality, it has religious and spiritual significance in man ...

, as an ordinal (also written as ''2nd'' or ''2d'') *

Second of arc A minute of arc, arcminute (abbreviated as arcmin), arc minute, or minute arc, denoted by the symbol , is a unit of angular measurement equal to of a degree. Since one degree is of a turn, or complete rotation, one arcminute is of a tu ...

, an angular measurement unit, of a degree

Music

Notes and intervals

Augmented second In Western classical music, an augmented second is an interval created by widening a major second by a chromatic semitone, spanning three semitones and enharmonically equivalent to a minor third in 12-tone equal temperament.Benward & Saker (2 ...

, an interval in classical music * Diminished second, unison *

Major second In Western music theory, a major second (sometimes also called whole tone or a whole step) is a second spanning two semitones (). A second is a musical interval encompassing two adjacent staff positions (see Interval number for more de ...

, a whole tone *

Minor second A semitone, also called a minor second, half step, or a half tone, is the smallest musical interval commonly used in Western tonal music, and it is considered the most dissonant when sounded harmonically. It is defined as the interval between ...

, semitone *

Neutral second In music theory, a neutral interval is an interval that is neither a major nor minor, but instead in between. For example, in equal temperament, a major third is 400 cents, a minor third is 300 cents, and a neutral third is 350 cents. A neutral ...

one-and-a-half semitones

Albums

* '' The Second'', second studio album by rock band Steppenwolf * The 2nd (album), a 2006 album by Hater * ''Seconds'' (The Dogs D'Amour album), released in 2000 * ''Seconds'' (Kate Rogers album), released in 2005 * ''Seconds'' (Tim Berne album), released in 2007

EPs

* ''2nd'' (The Rasmus EP), 1996 * ''Second'' (Baroness EP), 2005 * ''Second'' (Raye EP), 2014

Songs

* "Second", a 2019 song by Erika Costell * "Second", a 2020 song by

Hope D Hope Defteros (born 1999/2000), known professionally as Hope D, is an Australian singer-songwriter and musician from Brisbane. Winning Queensland Music Awards in 2020 and 2021, she has released one EP – ''Cash Only'' (2021), and one studio a ...

* "Second", a song from Sleaford Mods' 2020 compilation album '' All That Glue'' * "Second" (song), a 2021 song by Hyoyeon * "Seconds", from The Human League's 1981 album ''

Dare Dare may refer to: Places * Dare, Vera Cruz, a ''suco'' in Vera Cruz administrative post, Dili Municipality, Timor-Leste * Darè, Italy, a comune * Dare County, North Carolina, United States * Dare, Virginia, United States, an unincorporate ...

'' * "Seconds" (song), from U2's 1983 album ''War'' * "Seconds", from Le Tigre's 2004 album ''This Island''

Film and television

* ''The 2nd'' (film), an American 2020 film starring Ryan Phillippe * ''The Second'' (film), a 2018 Australian film directed by Mairi Cameron, winner of the 2018 AACTA Award for Best Indie Film * ''Seconds'' (1966 film), a US thriller directed by John Frankenheimer * ''Seconds'' (2014 film), an Indian Malayalam-language thriller film by Aneesh Upasana * "Seconds" (''The Batman''), an episode in the American animated TV series * "Seconds", an episode of the American TV series ''Lois & Clark: The New Adventures of Superman''

Publications

* ''Seconds'', an interview magazine published from 1987–2000. * ''Seconds'' (comics), a 2014 graphic novel by Bryan Lee O'Malley

Science

* Second of

right ascension Right ascension (abbreviated RA; symbol ) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the equinox (celestial coordinates), March equinox to the (hour circle of the) point in questio ...

, in astronomy *

Specific Impulse Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine, such as a rocket engine, rocket using propellant or a jet engine using fuel, generates thrust. In general, this is a ratio of the ''Impulse (physics), ...

(rocket engine)

Sports, games, and dueling

* Second in a

duel A duel is an arranged engagement in combat between two people with matched weapons. During the 17th and 18th centuries (and earlier), duels were mostly single combats fought with swords (the rapier and later the small sword), but beginning in ...

, the agent of the participant * Second, the

cornerman In combat sports, a cornerman, or second, is a coach or trainer assisting a fighter during a bout. The cornerman is forbidden to instruct and must remain outside the combat area during the round. In the break, they are permitted to enter the r ...

in combative sports such as boxing * Second (chess), assistant to a chess player * Second (climbing), the climber who belays the lead climber in lead climbing *

Second (curling) In curling, the second is the person who delivers the second pair of stones after the lead. On most teams, where the second does not act as skip or vice, the second will sweep for each of their teammates. Due to the free-guard-zone rule, which pr ...

, delivers the second set of stones in curling * Second dealing, a way of cheating in card games

Other uses

Albéric Second Pierre Albéric Second, (17 June 1817 - 2 June 1887 Factory second, a new product sold for a discount because of minor imperfections *

Second (parliamentary procedure) The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of ...

, to formally support a motion or resolution * Second hand or used goods, items that have been used before being resold * Second-class degree, a class of academic degree in countries based on the British system of education *

Second-in-command Second-in-command (2i/c or 2IC) is a title denoting that the holder of the title is the second-highest authority within a certain organisation. Usage In the British Army or Royal Marines, the second-in-command is the deputy commander of a unit, f ...

, a deputy commander in British and Commonwealth armies