celtic
n. C / Un. a group of languages spoken in parts of Europe, like Irish, Welsh, and Scottish Gaelic. It can also refer to the people who spoke these languages in ancient times.
n. a branch of the Indo-European language family that includes Irish, Welsh, Breton, and Scottish Gaelic. When used as a collective noun, it refers to the ancient peoples of Western and Central Europe who spoke these languages.
She is studying the history of the Celtic languages.
Many modern place names in England have their roots in Celtic rather than Old English or Latin.
Scholars often distinguish between the Continental Celtic of ancient Gaul and the Insular Celtic that survived and evolved in the British Isles and Brittany.
Borrowed from French celtique or Latin celticus, equivalent to Celt + -ic. First attested in the 17th century.
Uncountable when referring to the language family; countable when referring to a specific language or an ancient person.