The 3rd largest ocean; bounded by Africa on the west, Asia on the north, Australia on the east and merging with the Antarctic Ocean to the south WordNet 3.0 & Open English WordNet

The Indian Ocean is the third-largest of the world's five oceanic divisions, covering 70,560,000 km2 or ~19.8% of the water on Earth's surface. Wikipedia

Earlier called the "Eastern Ocean" or "Eastern Sea" Wikipedia Disambiguation

Ocean bounded by Africa, Asia, Australia, and Antartica Wikidata

A body of water between the continents of Africa, Antarctica, Asia and Australia including the Bay of Bengal in the east and the Arabian Sea (with the Red Sea, the Gulf of Aden and the Persian Gulf) in the west, and containing several islands and island chains, such as the Andaman, Nicobar and Seychelles. OmegaWiki

The ocean separating Africa, southern Asia, Australia and Antarctica. Wiktionary