Nā'bob, n.
n. [Hind. nawwāb, from Ar. nuwwāb, pl. of nā'ib, a vicegerent, governor, from nāba, to take one's turn.]
Sense 1. A deputy or viceroy in India; a governor of a province of the Mogul empire.
Sense 2. Hence, one who returns to Europe from the East with immense wealth; and generally, a wealthy and luxurious man; one rolling in wealth and luxury.
☞ Sometimes, but less correctly, accented on the last syllable.