What is the meaning of Dependency?

A state of dependence; a refusal to exercise initiative.

Something dependent on, or subordinate to, something else:

The status of being a legal dependent; the relationship between a dependent and their provider.

A colony, or a territory subject to rule by an external power.

A dependence on a habit-forming substance such as a drug or alcohol.

Reliance on the functionality provided by some other, external component.

An external component whose functionality is relied on.

Source: wiktionary.org