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API

American

abbreviation

American Petroleum Institute. Also A.P.I.
Computers. application programming (or program) interface: a set of protocols used by programmers to create applications for a specific operating system or to interface between the different modules of an application.

API British

abbreviation

application programming interface

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Alibaba’s Token Hub unit plans to launch API access for HappyHorse 1.0 in the near future, currently under internal beta test.

From The Wall Street Journal • Apr. 10, 2026

While the API has a meeting every March, this time they will discuss the role of American oil and natural gas in supporting reliable energy supply amid global volatility.

From Barron's • Mar. 19, 2026

That’s led to security concerns, as cybersecurity company Wiz identified a database misconfiguration in early February that left 1.5 million API authentication tokens, 35,000 email addresses and private messages between agents exposed.

From MarketWatch • Mar. 10, 2026

Data from expense-management startup Ramp shows that Anthropic in January dominated so-called API spending, which occurs when users access an AI model through a third-party service.

From The Wall Street Journal • Feb. 6, 2026

This is a glimpse of the API at work in the game.

From "Warcross" by Marie Lu

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023