# Dependency

Dependency, dependence, dependent or depend may refer to:

## Computer science

* Dependency (computer science) or coupling, a state in which one object uses a function of another object
* Data dependency, which describes a dependence relation between statements in a program
* Dependence analysis, in compiler theory
* Dependency (UML), a relationship between one element in the Unified Modeling Language
* Dependency relation, a type of binary relation in mathematics and computer science.
* Functional dependency, a relationship between database attributes allowing normalization.
* Dependent type, in computer science and logic, a type that depends on a value
* Hidden dependency, a relation in which a change in many areas of a program produces unexpected side-effects
* Library dependency, a relationship described in and managed by a software dependency manager tool to mitigate dependency hell

## Economics

* Dependant (British English) (Dependent - American English), a person who depends on another as a primary source of income
* Dependency ratio, in economics, the ratio of the economically dependent part of the economy to the productive part
* Dependency theory, an economic worldview that posits that resources flow from poor states to wealthy states

## Linguistics

* Dependent and independent verb forms, distinct verb forms in Goidelic languages used with or without a preceding particle
* Dependency grammar is based on the dependency relation between the lexemes of a sentence
* Dependent clause

## Mathematics

* Dependency relation, a type of binary relation in mathematics and computer science.
* Dependent and independent variables, in mathematics, the variable that depends on the independent variable
* The absence of independence (probability theory)
** Tail dependence, from probability theory
** Serial dependence, in statistics
** Correlation and dependence
** Mean dependence

## Medicine and psychology

* Codependence, a pattern of detrimental behavioral interactions within a dysfunctional relationship
* Dependency need, the real need of the organism, or something that individuals cannot provide for themselves
* Dependent personality disorder, a personality disorder characterized by a pervasive psychological dependence on other people
* Substance dependence, an adaptive state associated with a withdrawal syndrome upon cessation of repeated exposure to a stimulus (e.g., drug intake)
** Physical dependence, dependence that involves persistent physical–somatic withdrawal symptoms (e.g., fatigue and delirium tremens)
** Psychological dependence, dependence that involves emotional–motivational withdrawal symptoms (e.g., dysphoria and anhedonia)
** Alcohol dependence
** Amphetamine dependence
** Barbiturate dependence
** Benzodiazepine dependence
** Caffeine dependence
** Cannabis dependence
** Cocaine dependence
** Opioid dependence
** Tanning dependence

## Political science

* Dependent territory, a classification of territory, especially a region that is not a sovereign state but a possession of same
** Crown Dependencies, three specific dependencies of the United Kingdom: the Bailiwick of Guernsey, the Bailiwick of Jersey, and the Isle of Man
** Dependencies of Norway
** Ross Dependency, New Zealand Antarctic claim

## Music

* Dependent (record label), a German independent record label that focuses on aggrotech, electro-industrial and futurepop music
* Dependent Music, an independent Canadian record label, owned and operated by the artists that were a part of the collective
* Dependency (band), an American Christian hardcore band

## Philosophy

* Dependent (origination), in Buddhism, the idea that the existence of everything is conditional and dependent on a cause, and that nothing happens fortuitously or by chance

## Other uses

* Depend (undergarment), a brand of absorbent, disposable underwear for adults
* Dependency (project management), a link amongst a project's terminal elements
* Dependency (religion), the relation of a monastic community with a newer community