Old Bombay was used to refer to the area which was formed by the merging of the seven original islands of Mumbai, India. The term is now archaic and was used from the 19th century until the 1980s. The more widely used term today is just the word 'town'.
When the islands were merged, the area became Old Bombay. The region north of this became Greater Bombay; now known as the 'Suburbs'. Greater Bombay encompasses an area 5 times the size of Old Bombay.
The region of Old Bombay consists of downtown South Mumbai which is the richest area in India and the nerve centre of Indian commerce.
Read more about this topic: South Mumbai