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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

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

Source: Webster's Revised Unabridged Dictionary (1913)