I·rish 
(īrĭsh)
(īrĭsh)adj.
Of or relating to Ireland or its people, language, or culture.
n.
1. (used with a pl. verb)
a. The people of Ireland.
b. People of Irish ancestry.
2.
a. The Goidelic language of Ireland. Also called Irish Gaelic.
b. See Irish English.
3. Informal Fieriness of temper or passion; high spirit.
[Middle English, from Old English Īras, the Irish; see peiə- in the Appendix of Indo-European roots.]