| Indian Ocean | |
| —n | |
| an ocean bordered by Africa in the west, Asia in the north, and Australia in the east and merging with the Antarctic Ocean in the south. Average depth: 3900 m (13 000 ft). Greatest depth (off the Sunda Islands): 7450 m (24 442 ft). In December 2004 a major undersea earthquake off Sumatra triggered a tsunami which affected large areas of the ocean as far away as east Africa, and killed an estimated 226 435 people. Area: about 73 556 000 sq km (28 400 000 sq miles) | |
| a fool or simpleton; ninny. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
Third-largest ocean (after the Atlantic Ocean and Pacific Ocean), extending from southern Asia to Antarctica and from eastern Africa to southeastern Australia.