a set of programming tools that enables a program to communicate with another program or an operating system, and that helps software developers create their own applications (= pieces of software) (the abbreviation for ‘application programming interface’) 應用程序接口, 應用程式介面 ,應用程式設計介面 (全寫爲 application programming interface)The company is opening up its API so that outside developers can use it to build their own programs. 該公司將會開放應用程序接口,以便外部開發人員用以構建自己的程序。