dependency

American  

[dih-pen-duhn-see] / dɪˈpɛn dən si /

Or dependancy

noun

dependencies plural

1. the state of being dependent; dependence.

2. something dependent or subordinate; appurtenance.

3. an outbuilding or annex.

4. a subject territory that is not an integral part of the ruling country.

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dependency British  

/ dɪˈpɛndənsɪ /

noun

1. a territory subject to a state on which it does not border

2. a dependent or subordinate person or thing

3. psychol overreliance by a person on another person or on a drug, etc

4. another word for dependence

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Other Word Forms

Derived Forms

• nondependancy
  noun
• nondependency
  noun
• self-dependency
  noun

Inflected Forms

Nouns

• dependencies
  plural

Etymology

Origin of dependency

First recorded in 1585–95; dependence + -y ³

Explanation

Dependency happens when you can't function without the help of someone or something. If you have a dependency on coffee, you need it to be human in the morning. Not sure? Ask the people you live with. A dependency on the help or support of another person isn't necessarily negative, but other kinds of dependency — on something habit-forming or addictive, like cigarettes — can be harmful. You can also use this noun to mean "a country, province, or territory controlled by a bigger, more powerful country." Guam and Puerto Rico, which don't have complete independence from the US, can be called dependencies.

Example Sentences

The company has deepened its focus on Composer in recent months, aiming to catch up to and reduce dependency on frontier labs.

From MarketWatch • Jun. 19, 2026

A "mapping" project published by campaign group everyone.AI ahead of the G7 meeting highlighted risks of "social replacement and emotional dependency" for teenagers using chatbots.

From Barron's • Jun. 16, 2026

That allows Tehran to sell the deal as a path to investment and reconstruction rather than dependency on America.

From BBC • Jun. 16, 2026

As for the state’s role in welfare dependency, Mr. Vance no longer has much to say about it.

From The Wall Street Journal • Jun. 15, 2026

There were men who were forced to take advantage of this system of substitute-hiring because of serious illness in the home or the dependency of motherless children.

From "Across Five Aprils" by Irene Hunt