Dependency or dependent may refer to:

Medicine and psychology

• Chemical dependency, a need for a substance so strong that it becomes necessary to have this substance to function properly
• Co-dependency, a behavioural condition
• Dependence (behavioral medicine), a continuum of physical and psychological attachments related to the concept of addiction
• Dependent Personality Disorder, a psychiatric condition

Applied mathematics and computer science

• Coupling (computer science), also called dependency, a state in which one object uses a functionality of another object
• Dependency (project management), a link amongst a project's terminal elements
• Dependency relation, a type of binary relation in mathematics and computer science.
• Dependency (UML), a relationship between two elements in the Unified Modeling Language
• Dependent type, in computer science and logic, a type which depends on a value
• Dependent variable, in mathematics and experimental design, a factor whose values in different treatment conditions are compared
• a join dependency, in computer science, occurs when a join operation is performed

Other

• Dependent area or dependent territory, a classification of territory, especially a region that is not a sovereign state, but the possession of such.
• Dependant (law), a person who depends on another as a primary source of income. For example, a minor child, under the age of majority, is a dependent of his or her parent and the existence of the dependent enables the provider, such as a parent or guardian, to claim a deduction for the purpose of income tax calculations
• Dependency theory, an economic worldview
• Dependent Music, a record label
• Dependent Records, a record label
• Dependency ratio, in economics, the ratio of the economically dependent part of the economy to the productive part.

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