noun a native or inhabitant of miletus.
2. milesian ·noun a native or inhabitant of ireland.
3. milesian ·adj of or pertaining to miletus, a city of asia minor, or to its inhabitants.
4. milesian ·adj 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.