1. 爱尔兰的;爱尔兰人的;爱尔兰语的;爱尔兰文化的
Irish means belonging or relating to Ireland, or to its people, language, or culture. Irish sometimes refers to the whole of Ireland, and sometimes only to the Republic of Ireland.

2. 爱尔兰人
The Irish are the people of Ireland, or of the Republic of Ireland.

3. (尤指爱尔兰共和国人民讲的)爱尔兰语
Irish is a Celtic language spoken by people who live in Ireland, especially in the Republic of Ireland.