Non-Celtic is a term used to refer to anything that is not related to the Celtic culture or people. Some synonyms for non-Celtic include non-Gaelic, non-British, non-Irish, non-Scottish and non-Welsh. These terms indicate that something is not related to the ancient Celtic civilization that existed in Europe during the Iron Age. From languages to traditions and customs, anything that is non-Celtic is considered to be distinct from the Celtic culture. These synonyms are useful when discussing things like history, geography, and anthropology, in order to differentiate between groups and cultures.