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: 4000 m (13 123 ft). Greatest depth (off the Sunda Islands): 7187 m (25 579 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)
WordReference Random House Unabridged Dictionary of American English © 2025
In′dian O′cean,
- Place Namesan ocean S of Asia, E of Africa, and W of Australia. 28,357,000 sq. mi. (73,444,630 sq. km).
Collins Concise English Dictionary © HarperCollins Publishers::
'Indian Ocean' also found in these entries (note: many are not synonyms or translations):
Aceh
- Aden
- Africa
- Amery Ice Shelf
- Andaman and Nicobar Islands
- Arabian Sea
- Asia
- Australia
- Banda Aceh
- Bass Strait
- Bengal
- British Indian Ocean Territory
- Chagos Archipelago
- Christmas Island
- Ciskei
- Cocos Islands
- Comorin
- Comoro Islands
- Comoros
- Dar es Salaam
- Dehiwala-Mount Lavinia
- Delagoa Bay
- Durban
- Farquhar Islands
- Fremantle
- French Southern and Antarctic Lands
- Galle
- Great Australian Bight
- Guardafui
- Hadhramaut
- Heard Island and McDonald Islands
- India
- Indonesia
- Java Trench
- Juba
- Kangaroo Island
- Kenya
- Kerguelen
- Kismaayo
- Komati
- Limpopo
- Lombok
- Lützow-Holm Bay
- Madagascar
- Mahé
- Maldives
- Mannar
- Maputo Bay
- Mascarene Islands
- Mauritian