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API

American  

abbreviation

  1. American Petroleum Institute. Also A.P.I.

  2. 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

  1. 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.

Two days after its release, Meta’s chief AI officer, Alexandr Wang, posted on X that the API would be launching shortly.

From The Wall Street Journal • Jun. 4, 2026

For so-called closed AI models, meaning models that are kept proprietary and not publicly available for download, the only way for developers to access them is via API.

From The Wall Street Journal • Jun. 4, 2026

“The muse spark API will be coming soon! we have been thrilled with the amount of excitement amongst developers who want to try muse spark inside their agentic harnesses,” he wrote.

From The Wall Street Journal • Jun. 4, 2026

Citing its recent string of compute deals, the company raised usage limits for its Claude Code tool and API rate limits for the Claude Opus reasoning model.

From Barron's • May 6, 2026

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

From "Warcross" by Marie Lu

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