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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.

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

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

“For the next 12 months, we’ll support general purpose AI chatbots using the WhatsApp Business API in Europe in response to the European Commission’s regulatory process,” a WhatsApp spokesperson said.

From The Wall Street Journal • Mar. 5, 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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.