The Islamic State (IS), [a] also known as the Islamic State of Iraq and the Levant (ISIL), [b] the Islamic State of Iraq and Syria (ISIS), and by its Arabic acronym Da'esh, is a transnational Salafi jihadist militant organisation and internationally unrecognised quasi-state. [111][112] IS occupied a significant amount of territory in Syria during the Syrian Civil War and in Iraq after the U.S. Jack Hartmann and Jan Richardson join together to teach sight words. Learn the sight word is. Learn how to spell is, put the letters in the correct order w. IS definition: 1. he/she/it form of be 2. he/she/it form of be 3. be, used with he/she/it. Learn more. IS meaning: 1. he/she/it form of be 2. he/she/it form of be 3. be, used with he/she/it. Learn more. What part of speech is the word “is,” and how do you use it in a sentence? Learn this and more in our guide to this commonly used word. The meaning of IS is present tense third-person singular of be; dialectal present tense first-person and third-person singular of be; dialectal present tense plural of be; plural of i:1. How to use is in a sentence. Is (Chick Corea album) Is (My Morning Jacket album) iS – internal section, a video game developed by Square is, an album by Hey Ocean!.