Sign (disambiguation) explained

A sign is an entity which indicates another entity.

Sign may also refer to:

Communication

Signage, the use of signs and visual graphics to convey information
Signature, a handwritten depiction of someone's name or other mark used as a proof of identity and intent
Sign (semiotics), anything that communicates a meaning
Sign language, a languages that uses the visual-manual modality to convey meaning

Sign (mathematics), an indication of negative and positive numbers
- Sign function, also known as the signum function
- Sign of a permutation of a finite set

Project Sign, a project by the U.S. Air Force to investigate unidentified flying objects (UFOs)
Servicio de Inteligencia de la Gendarmería Nacional or Inteligencia de la Gendarmería Nacional Argentina, the Argentine intelligence service
Scottish Intercollegiate Guideline Network, a Scottish group that develops evidence-based medical guidelines

Sign (band), an Icelandic band
Sign (Clock DVA album), 1993
"Sign" (Mr. Children song), 2004
"Sign" (Beni Arashiro song), 2010
"Sign" (Flow song), 2010
"Sign", a 2018 song by Exo from Don't Mess Up My Tempo
"Sign", a 2001 song by Marcella Detroit from Dancing Madly Sideways
"Sign", a song by Susumu Hirasawa
- "Sign-2", a different version of "Sign" from
Sign (Autechre album), 2020
"The Sign" (song), a 1993 song by Ace of Base
The Sign (Ace of Base album), a 1993 album by Ace of Base