Look up second, seconds, or 2nd in Wiktionary, the free dictionary.

A second 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), as an ordinal (also written as 2nd or 2d)
• Second of arc, an angular measurement unit, 1/3600 of a degree

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

• 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
• "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
• "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, in astronomy
• Specific Impulse (rocket engine)

Sports, games, and dueling

• Second in a duel, the agent of the participant
• Second, the cornerman 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), delivers the second set of stones in curling
• Second dealing, a way of cheating in card games

Other uses

• Albéric Second, a French journalist and writer
• Factory second, a new product sold for a discount because of minor imperfections
• Second (parliamentary procedure), 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, a deputy commander in British and Commonwealth armies