• Entity
  Entity
  An entity is something that has a distinct, separate existence, although it need not be a material existence. In particular, abstractions and legal fictions are usually regarded as entities. In general, there is also no presumption that an entity is animate.An entity could be viewed as a set...
  
  , a unit
• a part of an Entity-relationship model
  Entity-relationship model
  In software engineering, an entity-relationship model is an abstract and conceptual representation of data. Entity-relationship modeling is a database modeling method, used to produce a type of conceptual schema or semantic data model of a system, often a relational database, and its requirements...
  
   or Entity-relationship diagram
• Character entity reference
  Character entity reference
  In the markup languages SGML, HTML, XHTML and XML, a character entity reference is a reference to a particular kind of named entity that has been predefined or explicitly declared in a Document Type Definition . The "replacement text" of the entity consists of a single character from the Universal...
  
   in HTML
  HTML
  HyperText Markup Language is the predominant markup language for web pages. HTML elements are the basic building-blocks of webpages....
  
  , XML
  XML
  Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....
  
   or SGML
• Entity (netlabel)
  Entity (netlabel)
  Entity is a netlabel specialising in experimental electronic music. The label was established in 2003 by Belgian musicians Jan Robbe and Nico de Gols, working under the monikers UndaCova and Kaebin Yield, respectively...
  
  , a Belgian netlabel specialising in experimental electronic music
• Legal Entity, an entity that can bear legal rights
  Rights
  Rights are legal, social, or ethical principles of freedom or entitlement; that is, rights are the fundamental normative rules about what is allowed of people or owed to people, according to some legal system, social convention, or ethical theory...
  
   and obligations.
• Entity class, in computer programming a class that represents a thing.
• The Entity, the espionage agency of the Vatican City.

In fiction

• "Entity" (Stargate SG-1), an episode of the television series Stargate SG-1
• The Entity
  The Entity
  The Entity is a horror film purportedly based on the paranormal events a woman and her family experienced circa 1976. It stars Barbara Hershey as a woman tormented by an unseen entity...
  
  , a 1981 horror film
• The Entity (Anderson)
  The Entity (Anderson)
  The Entity is a science fiction short story by Poul Anderson and John Gergen that appeared in the June 1949 issue of Astounding Science Fiction...
  
  , a science fiction story by Poul Anderson and John Gergen
• "The Entity" (South Park)
  The Entity (South Park)
  "The Entity" is the eleventh episode of the fifth season of the animated television series South Park, and 76th episode of the series overall. "The Entity" originally aired in the United States on November 21, 2001 on Comedy Central. This episode introduces Kyle's cousin Kyle...
  
  , an episode of the television series South Park
• Ion (DC Comics), Parallax (comics)
  Parallax (comics)
  Parallax is a fictional comic book supervillain in the DC Comics universe. Created by writer Ron Marz and artist Darryl Banks for Green Lantern vol...
  
  , and five other related beings in DC comics, associated with the Lanterns Corps of the Blackest Night storyline. See White Lantern#Entity.