Separation

Separation may refer to:

Films

 * Separation (1967 film), a British feature film written by and starring Jane Arden and directed by Jack Bond
 * La Séparation, 1994 French film
 * A Separation, 2011 Iranian film
 * Separation (2013 film), an American thriller film starring Sarah Manninen
 * Separation (2021 film), an American horror film

Literature

 * The Separation (Bury Novel), an 1830 novel by Lady Charlotte Bury
 * The Separation (Priest novel), a 2002 novel by Christopher Priest
 * The Separation (Applegate ovel), a 1999 novel in the Animorphs series by K.A. Applegate
 * Separation, a 1976 Canadian political novel by Richard Rohmer

Music

 * Separation, a 2011 album by Balance and Composure
 * Separation (EP), a 2006 EP by Halou
 * Separations (album), a 1992 album by British alternative rock band Pulp
 * Separation (band), a Swedish straight edge hardcore punk band
 * Separation mastering, in music recording

Law and politics

 * Marital separation, when a married couple ceases living together without a divorce
 * Legal separation, a legal status where married couples may disentangle their finances without divorce
 * Nonconformity to the world (separation from the world), a belief among some Protestant religious groups that the members of a church should be separate from "the world"
 * Political separation (separatism), advocacy of a state of cultural, ethnic, tribal, religious, racial, governmental or gender separation from the larger group
 * Separation of church and state, the idea that religion and government functions should be separate

Mathematics and science

 * Separation (behavior), the behavior of flocking animals to stand off from their neighbours
 * Separation (statistics), a problem encountered in fitting models for categorical outcomes
 * Flow separation, separation of a fluid boundary layer from the surface of a solid body moving relative to the fluid
 * Intertemporal portfolio choice, where in some contexts portfolio choices for many periods can be made separately
 * Separated sets, related concept in topology, two sets disjoint from the other's closure
 * Separation axiom, concepts in the area of mathematics called topology
 * Separation of concerns, in computer science (and problem-solving in general)
 * Separation of variables, in mathematics to solve certain (separable) differential equations
 * Separation principle, in control theory
 * Separation process, in chemistry
 * Separation theorem (disambiguation): several different theorems related to separation, in different scientific disciplines, for example:
 * Mutual fund separation theorem, allowing a portfolio optimization problem to be separated into smaller problems
 * Point-pair separation, in an order two pairs of points may or may not separate each other

Other uses

 * Separation (aeronautics), rules to minimise the risk of collision between aircraft in flight
 * Separation (United States military), the process by which a service member leaves active duty
 * Separation anxiety disorder, an anxiety disorder in which an individual experiences excessive anxiety regarding separation from home and/or from people to whom the individual has a strong emotional attachment
 * Racial separation, the separation of different racial groups in daily life
 * Six degrees of separation, the idea that everyone is on average approximately six steps away, by way of introduction, from any other person on earth
 * Curdling of an emulsion in cookery is called "separation"