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Significant figures
Significant figures, also called significant digits or sig figs, are the digits in a reported numerical value that carry meaningful information, showing the precision a measurement actually supports.
Significant other
Significant other (SO): a gender-neutral term for a spouse or long-term romantic partner that presumes nothing about marital status or orientation; in sociology and psychology it instead means anyone, such as a parent or peer, who strongly shapes a person's self-concept.
Significant Other (album)
Significant Other is Limp Bizkit's second studio album, released June 22, 1999 on Interscope. Produced by Terry Date, it debuted at number one on the Billboard 200, sold 640,000 copies in its first week, and features Nookie, Break Stuff, and Re-Arranged.
Significant Other (film)
Significant Other is a 2022 American sci-fi horror thriller by Dan Berk and Robert Olsen, starring Maika Monroe and Jake Lacy as a couple whose Pacific Northwest backpacking trip meets a shapeshifting alien; it premiered October 7, 2022 on Paramount+.
Significant wave height
Significant wave height (Hs, also SWH) is the mean height of the highest one third of waves, the standard measure of sea state in forecasts and offshore engineering.
Signified and signifier
Signified and signifier: the two components of Ferdinand de Saussure's linguistic sign from the Cours de linguistique générale (1916), the signifier being the sound-image and the signified the concept, joined arbitrarily and contrasted with Peirce's triadic model.
Signify (company)
Signify, known as Philips Lighting until May 2018, is a Dutch lighting company headquartered in Eindhoven, the world's largest lighting maker, whose brands include Philips Hue and WiZ.
Signilskär-Märket Archipelago
Signilskär-Märket Archipelago, Ramsar site no. 5 in Åland, Finland, designated 1974: about 50 treeless islands near the Swedish border, rich birdlife, a 1927 bird-banding station, grey seals at Märket, and oil pollution as the main threat.
Signing of the United States Declaration of Independence
Signing of the Declaration of Independence: 56 Second Continental Congress delegates signed the engrossed parchment beginning August 2, 1776, not July 4; John Hancock signed first, arranged by state from New Hampshire to Georgia.
Signoff (EDA)
Signoff in electronic design automation is the final verification stage of a chip design flow, checking timing, power, and physical rules against foundry requirements before tapeout.
Signora Volpe
Signora Volpe is a British-Italian detective drama starring Emilia Fox as Sylvia Fox, a former MI6 spy who becomes an amateur detective in Umbria, Italy, from 2022.
Signs (film)
Signs is a 2002 American science fiction thriller written and directed by M. Night Shyamalan, starring Mel Gibson as a former priest whose farm shows signs of alien visitation.
Signs (Luke Bryan album)
Signs is Luke Bryan's ninth studio album, released September 18, 2026 on MCA Nashville, produced by Jeff Stevens, Jody Stevens, and Matt Dragstrem. It features the Luke Combs duet "Finders Keepers" and the Top 10 single "Country And She Knows It".
Signs and symptoms
Signs and symptoms: clinical manifestations of disease. A symptom is subjective, perceived by the patient; a sign is objective, observed by the clinician. Defined in MeSH D012816 and coded in ICD-10-CM R00-R99.
Signs and symptoms of HIV/AIDS
Signs and symptoms of HIV/AIDS: flu-like acute illness 2–4 weeks after infection, symptom-free clinical latency lasting about a decade, then AIDS with CD4 below 200 cells/mm3 and opportunistic infections; testing is the only reliable diagnosis.
Signs of the coming of Judgement Day
Signs of the coming of Judgement Day are portents in several religious traditions that precede the end of the world and the final judgment, a subject called eschatology.
Signum
Signum is a Dutch trance act formed in 1997 in Zoetermeer by Ronald Hagen and Pascal Minnaard, best known for 'What Ya Got 4 Me'.
SignWriting
SignWriting (Sutton SignWriting) is a featural writing system for signed languages, invented by Valerie Sutton in 1974 from her DanceWriting notation; it uses iconic 2D symbol layouts, is Unicode-encoded, and is most widely used in Brazilian Deaf schools.
Sigourney Weaver
Sigourney Weaver (born Susan Alexandra Weaver, 1949) is an American actress famous as Ellen Ripley in the Alien franchise, with three Oscar nominations, two Golden Globes, a BAFTA, and roles in Avatar and The Mandalorian and Grogu.
Sigrdrífumál
Sigrdrífumál, also spelled Sigurdrífumál, is an Old Norse heroic poem in the thirteenth-century Codex Regius in which the valkyrie Sigrdrífa teaches the dragon-slayer Sigurðr runic magic and moral wisdom.
Sigrid (singer)
Sigrid (Sigrid Solbakk Raabe, born 1996, Ålesund) is a Norwegian pop singer-songwriter; winner of BBC Sound of 2018, albums Sucker Punch, How to Let Go, There's Always More That I Could Say; Spellemannprisen winner. Not the Austrian duo Sigrid & Marina.
Sigrid Combüchen
Sigrid Combüchen is a Swedish novelist and literary critic, born in 1942 in Solingen, Germany, who debuted at eighteen in 1960 and won the August Prize for Spill in 2010.
Sigrid Thornton
Sigrid Thornton (born 1959, Canberra) is an Australian actor known for The Man from Snowy River, All the Rivers Run, SeaChange, and CBS's Paradise; Officer of the Order of Australia (2019) and inaugural NIDA Fellow.
Sigrid Undset
Sigrid Undset (1882–1949), Norwegian novelist and 1928 Nobel laureate in Literature, famous for the medieval trilogy Kristin Lavransdatter; Catholic convert, Nazi-banned author, wartime exile in the USA.
Sigrid Valdis
Sigrid Valdis (Patricia Annette Olson, 1935–2007), American actress who played Hilda, Colonel Klink's secretary on Hogan's Heroes, and married its star Bob Crane in 1970.
Sigrid Wolf
Sigrid Wolf, Austrian alpine skier born 1964 in Breitenwang, Tirol; won the first Olympic women's Super-G at Calgary 1988, 1989 world silver, five World Cup wins, career ended by knee injury in 1990.
Sigrun Fossae
Sigrun Fossae, a 970 km fossa (trough) system on Venus at 50.5°N, 18°E, IAU-approved 1985 and named for a Norse Valkyrie; namesake of the Sigrun Group plains deformed by graben.
Sigrun Wodars Grau
Sigrun Wodars Grau, née Ludwigs (born 1965), East German 800 m runner; 1988 Seoul Olympic champion, 1987 world champion, 1990 European champion; competed in 1992 as Sigrun Grau.
SIGSALY
SIGSALY, also known as Ciphony I, was the first secure voice encryption system, built by Bell Labs and used by the U.S. Army from 1943.
Sigstore
Sigstore is an open source project for software supply chain security, announced by the Linux Foundation in 2021, that lets developers sign and verify software artifacts such as container images using ephemeral signing keys.