Definition of IOS:

  1. Apple Inc.'s mobile operating system

  2. Mobile operating software developed by Apple, designed specifically for Apple hardware. This operating software works with Apple iPhone, iPad, iPod Touch and Apple TV. It was first developed in 2007 and a major update is released each year. It has some features similar to Apple's operating software OS X for your computer. Its main competitor is the Android smartphone.

How to use IOS in a sentence?

  1. The iPod Touch and iPad are both iOS devices.

Meaning of IOS & IOS Definition