Gaelic a. : Of or pertaining to the Gael, esp. to the Celtic Highlanders of Scotland; as, the Gaelic language.

Gaelic n. : The language of the Gaels, esp. of the Highlanders of Scotland. It is a branch of the Celtic.

Example:
What is the easiest way to learn Gaelic?

Taxonomy
Gaelic, Scottish Gaelic, Scotland, language, English, Gaelic language, consonant, Gaelic speakers, Irish, speakers, vowels, Gaelic-speaking, proportion, Tha, Cad, Highland, education, decline.

Defination from the web:
... Scottish Gaelic should not be confused with the Scots language (Lowland Scots, Lallans), which is an Anglic language descended from Old English. ... Scottish Gaelic, a member of the Goidelic branch of Celtic and closely related to ...