Source : Webster's Revised Unabridged Dictionary (1913)

Erse \Erse\ ([~e]rs), n. [A modification of Irish, OE. Irishe.]
   A name sometimes given to that dialect of the Celtic which is
   spoken in the Highlands of Scotland; -- called, by the
   Highlanders, {Gaelic}.

Erse \Erse\, a.
   Of or pertaining to the Celtic race in the Highlands of
   Scotland, or to their language.

Source : WordNet®

Erse
     n : any of several related languages of the Celts in Ireland and
         Scotland [syn: {Gaelic}, {Goidelic}]