The term "Roman" can refer to several different meanings depending on context.
1) Roman may refer to something related to Rome, Italy or its culture and history such as a person from Rome, Italian language, Roman cuisine, Ancient Rome, the Roman Empire, etc.
2) In some cases, "Roman" can also be used in reference to things that are associated with the Latin language, for example: Romance languages (such as French, Spanish or Portuguese), Roman numerals, and so on.