<p><strong>Noun</strong></p><ul><li>A Celtic language that includes the speech of ancient Ireland and the dialects that have developed from it, especially those usually known as Irish, Manx, and Scottish Gaelic.</li><li>Gaelic constitutes the Goidelic subbranch of Celtic.</li></ul><p><strong>Adjective</strong></p><ul><li>Of or in Gaelic.</li><li>Of or relating to the Gaels or their language.</li></ul>