second The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds ...

is the base unit of time in the International System of Units (SI). Second, Seconds or 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 only even prime number. Because it forms the basis of a duality, it has religious and spiritual significance in many cultur ...

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

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

, an angular measurement unit, of a degree * Seconds (angle), units of angular measurement

Music

Notes and intervals

Augmented second In classical music from Western culture, an augmented second is an interval that, in equal temperament, is sonically equivalent to a minor third, spanning three semitones, and is created by widening a major second by a chromatic semitone.Benwar ...

, an interval in classical music *

Diminished second In modern Western tonal music theory, a diminished second is the interval produced by narrowing a minor second by one chromatic semitone.Bruce Benward and Marilyn Saker (2003). ''Music: In Theory and Practice, Vol. I'', p. 54. . Specific example ...

, 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 deta ...

, a whole tone *

Minor second A semitone, also called a 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 two adjacent no ...

, 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 and EPs

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

The Second ''The Second'' is the second studio album by Canadian-American rock band Steppenwolf, released in October 1968 on ABC Dunhill Records. The album contains one of Steppenwolf's most famous songs, " Magic Carpet Ride". The background of the origin ...

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

Songs

* "Second" (song), a 2021 song by Hyoyeon * "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, Queensland. Defteros has won a Queensland Music Award. and is best known for her single "Second", released in 2020. ...

* "Second", a 2019 song by Erika Costell * "Second", a song from Sleaford Mods' 2020 compilation album ''

All That Glue ''All That Glue'' is a compilation album by British electronic music duo Sleaford Mods. It was released on 15 May 2020 on the Rough Trade label. The album cover depicts Marcel Duchamp's readymade sculpture ''Fountain'' from 1917. Critical ...

'' * "Seconds", from The Human League's 1981 album ''

Dare Dare may refer to: Places * Dare, East Timor, a city * Darè, Italy, a commune * Dare County, North Carolina, United States * Dare, Virginia, United States, an unincorporated community Name * Dare (name), a list of people and fictional c ...

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

Film

The 2nd ''The 2nd'' is the second and final studio album by the American rock band Hater, released in 2005. The album was released 12 years after the band's debut, and is made up of songs recorded from 1994 to 1996. Production The album was recorded at ...

, an American 2020 film starring Ryan Phillippe * ''Seconds'' (1966 film), a US thriller directed by John Frankenheimer * ''Seconds'' (2014 film), a Malayalam thriller directed 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''

People

Albéric Second Pierre Albéric Second, (17 June 1817 - 2 June 1887 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, ...

, a deputy commander in British and Commonwealth armies

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 March equinox to the (hour circle of the) point in question above the earth. When paired w ...

, in astronomy *

Specific Impulse Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine (a rocket using propellant or a jet engine using fuel) creates thrust. For engines whose reaction mass is only the fuel they carry, specific impulse i ...

(rocket engine)

Sports, games, and dueling

Second dealing Second dealing (also known as ''dealing seconds'') is a method of manipulating a deck of cards during a card game by way of dealing the second, rather than the top card of the deck, usually for the purpose of cheating. Second dealing and bottom dea ...

, a way of cheating in card games *

Second (chess) This glossary of chess explains commonly used terms in chess, in alphabetical order. Some of these terms have their own pages, like ''fork'' and '' pin''. For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific ...

, assistant to a chess player *

Second (curling) In curling, the second is the person who delivers the second pair of stones. 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 prevents guards f ...

, delivers the second set of stones in curling * Second (

duel A duel is an arranged engagement in combat between two people, with matched weapons, in accordance with agreed-upon Code duello, rules. During the 17th and 18th centuries (and earlier), duels were mostly single combats fought with swords (the r ...

), 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 ri ...

in combative sports such as boxing * Second (

rock climbing Rock climbing is a sport in which participants climb up, across, or down natural rock formations. The goal is to reach the summit of a formation or the endpoint of a usually pre-defined route without falling. Rock climbing is a physically and ...

), the climber who follows the lead climber

Other

Second (parliamentary procedure) In deliberative bodies a second to a proposed motion is an indication that there is at least one person besides the mover that is interested in seeing the motion come before the meeting. It does not necessarily indicate that the seconder favors th ...

, to formally support a motion or resolution *

Factory second Factory seconds, also known as factory rejects or simply seconds, are retail items that, through minor fault of manufacture, are sold to the public for a reduced rate, rather than being discarded. The goods are often resold at this lower rate after ...

, a new product sold for a discount because of minor imperfections *

Second hand Used goods mean any item of personal property offered for sale not as new, including metals in any form except coins that are legal tender, but excluding books, magazines, and postage stamps. Risks Furniture, in particular bedding or upholstere ...

or used goods, items that have been used before being resold *

Academic degree An academic degree is a qualification awarded to students upon successful completion of a course of study in higher education, usually at a college or university. These institutions commonly offer degrees at various levels, usually including unde ...

, second-class degree, divided into upper-second and lower-second, or 2.1 and 2.2, in the

British undergraduate degree classification The British undergraduate degree classification system is a grading structure for undergraduate degrees or bachelor's degrees and integrated master's degrees in the United Kingdom. The system has been applied (sometimes with significant variati ...

Educational stage Educational stages are subdivisions of formal learning, typically covering early childhood education, primary education, secondary education and tertiary education. The United Nations Educational, Scientific and Cultural Organization (UNESCO) re ...

in North American

elementary schools A primary school (in Ireland, the United Kingdom, Australia, Trinidad and Tobago, Jamaica, and South Africa), junior school (in Australia), elementary school or grade school (in North America and the Philippines) is a school for primary ed ...

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