Source : Webster's Revised Unabridged Dictionary (1913)

Irish \I"rish\, a. [AS. ?risc, fr. ?ras the Irish. Cf. {Aryan},
   {Erse}.]
   Of or pertaining to Ireland or to its inhabitants; produced
   in Ireland.

   {Irish elk}. (Zo["o]l.) See under {Elk}.

   {Irish moss}.
   (a) (Bot.) Carrageen.
   (b) A preparation of the same made into a blanc mange.

   {Irish poplin}. See {Poplin}.

   {Irish potato}, the ordinary white potato, so called because
      it is a favorite article of food in Ireland.

   {Irish reef}, or {Irishman's reef} (Naut.), the head of a
      sail tied up.

   {Irish stew}, meat, potatoes, and onions, cut in small pieces
      and stewed.

Irish \I*rish"\, n. sing. & pl.
   1. pl. The natives or inhabitants of Ireland, esp. the Celtic
      natives or their descendants.

   2. The language of the Irish; the Hiberno-Celtic.

   3. An old game resembling backgammon.

Source : WordNet®

Irish
     n 1: people of Ireland or of Irish extraction [syn: {Irish people},
           {the Irish}]
     2: whiskey made in Ireland chiefly from barley [syn: {Irish
        whiskey}, {Irish whisky}]
     3: the Celtic language of Ireland [syn: {Irish Gaelic}]

Irish
     adj : of or relating to or characteristic of Ireland or its people