PHILIP Islands, two islands in the South Pacific Ocean, discovered in 1791, by Captain Hunter. They are joined together by a long sandy isthmus above water; and a sand-bank extends from the largest island above half a mile into the sea. They are very dangerous to ships in the night. Long. 140. 3. E. Lat. 8. 6. S. This is also the name of an island in the South Pacific Ocean, discovered by Captain Turnbull. Long. 143. 57. W. Lat. 16. 24. S.