2. Noun. (computing) A disk image of an ISO 9660 file system (such as a CD or DVD); also used as the file extension. ¹
3. Initialism. The Imperial Service Order. ¹
4. Initialism. In search of (in personal ads). ¹
5. Noun. (American football) An isolation play in which the fullback leads the tailback into the opposing defensive line ¹
¹ Source: wiktionary.com
Definition of Iso
1. film replay facilities [n -S]