Karachi, largest city and former capital of Pakistan, SE Pakistan, on the Arabian Sea near the Indus River delta. The capital of Sind prov., it is Pakistan’s chief seaport and industrial center, a transportation, commercial, and financial hub, and a military headquarters. It has a large automobile assembly plant, an oil refinery, a steel mill, shipbuilding, railroad yards, jute and textile factories, printing and publishing plants, media and entertainment industries, food processing plants, and chemical and engineering works. Karachi airport is one of the busiest in Asia. Karachi has a university and other educational institutions; the national museum, with a fine archaeological collection; and the tomb of Muhammad Ali Jinnah, founder of Pakistan.