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

Mathematics
2 (number), as an ordinal (also written as 2nd or 2d)
Second of arc, an angular measurement unit, 1/3600 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
"Second", a song from Sleaford Mods' 2020 compilation album All That Glue
"Seconds", from The Human League's 1981 album Dare
"Seconds" (song), from U2's 1983 album War
"Seconds", from Le Tigre's 2004 album This Island

Film
The 2nd, an American 2020 film starring Ryan Phillippe
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

People
Albéric Second, a French journalist and writer
Second-in-command, a deputy commander in British and Commonwealth armies

Science
Second of right ascension, in astronomy
Specific Impulse (rocket engine)

Sports, games, and dueling
Second (climbing), the climber who belays the lead climber in lead climbing
Second dealing, a way of cheating in card games
Second (chess), assistant to a chess player
Second (curling), delivers the second set of stones in curling
Second (duel), the agent of the participant
Second, the cornerman in combative sports such as boxing

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, second-class degree, divided into upper-second and lower-second, or 2.1 and 2.2, in the British undergraduate degree classification
Educational stage in North American elementary schools
Seconds, an interview magazine published from 1987–2000.
Seconds (comics), a 2014 graphic novel by Bryan Lee O'Malley.

See also
Secondment, a transfer of an employee, usually within an organization
Segundo (disambiguation)
SND (disambiguation)
Secondary (disambiguation)