(1):

(n.) A native or inhabitant of Ireland.

(2):

(n.) A native or inhabitant of Miletus.

(3):

(a.) Descended from King Milesius of Spain, whose two sons are said to have conquered Ireland about 1300 b. c.; or pertaining to the descendants of King Milesius; hence, Irish.

(4):

(a.) Of or pertaining to Miletus, a city of Asia Minor, or to its inhabitants.