Definition: Informix is a database management system that runs on IBM i machines, supporting many applications including MySQL and Oracle databases. The word has multiple meanings depending on the context: - Informix (1) refers to an open-source database management system used for small or medium-sized businesses. (2) It was created by IBM and is based on Java technology. - Informix (2) refers to a proprietary open-source database management system that supports various types of databases, including MySQL, PostgreSQL, and NoSQL solutions. The term "informix" is often abbreviated into "infomaster".