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a chemical dependency is such a strong need for a substance that it becomes necessary to have this substance just to function properly.

Co-dependency is a behavioural condition.

a dependence, in behavioral medicine, describes a continuum of physical and psychological attachments related to the concept of addiction.

dependency, a former or current colony

a dependency in computer science is a state in which one object uses a functionality of another object. This may cause changes on implementation of one object that can affect implementation of another object.

a dependency in project management is a link amongst a project's terminal elements.

Dependency theory, an economic worldview.

a dependent area is a classification of territory.

a dependent type, in computer science and logic, is a type which depends on a value.

a join dependency, in computer science, occurs when a join operation is performed.

The Ross Dependency is an area of Antarctica claimed by New Zealand.

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In law and tax legislation, a dependent is 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 providor, such as a parent or guardian, to claim a deduction for the purpose of income tax calculations.