The word Celtic can refer to:

• the European Celtic people, ancient or modern
  • the Celtic languages, spoken by these people and their modern descendents
  • the Celtic (Lusitania) , Celts from the Alentejo. (See also Celtiberians for a Celtic or related people in Iberia)
• Celtic Football Club of Glasgow, Scotland
• a type of stone tool
• the Boston Celtics professional basketball team