Gaelic as an adjective means "pertaining to the Gaels", whether to their language or their culture.
Gaelic may thus mean or refer to:
When referring to Scottish Gaelic, Gaelic is usually pronounced or ; in Scots and Scottish English. When referring to Irish or Manx, it is usually pronounced .
Shelta is sometimes counted as a Gaelic or Goidelic language; however, while it is closely associated with Irish Gaelic it is not genetically related, being instead a cant which has borrowed a great volume of Irish vocabulary.