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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.

The EU said it began its investigation, in December 2025, after Meta banned third-party general-purpose AI assistants from the WhatsApp for Business API.

From BBC • Jun. 9, 2026

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

Zuckerberg also said companies come to Meta every week asking it to establish an API service.

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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