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

Music

Notes and intervals

* Augmented second, an interval in classical music * Diminished second, unison * Major second, a whole tone * Minor second, semitone * Neutral second one-and-a-half semitones

Albums and EPs

* ''2nd'' (The Rasmus EP), 1996 * ''Second'' (Baroness EP), 2005 * ''Second'' (Raye EP), 2014 * '' The Second'', 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 * "Second", a 2019 song by

Erika Costell Erika Michaelanne Costell (born November 12, 1992) is an American Internet personality. Costell’s career began when she became associated with Team 10, an influencer marketing management agency. After dating YouTuber Jake Paul and featuring ...

* "Second", a song from Sleaford Mods' 2020 compilation album '' All That Glue'' * "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, a French journalist and writer *

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 (rocket engine)

Sports, games, and dueling

* Second dealing, 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 t ...

, assistant to a chess player * Second (curling), 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 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), to formally support a motion or resolution * Factory second, a new product sold for a discount because of minor imperfections * Second hand 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 *

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