Definitions for "Rasool"
Messenger (Prophet to whom a scripture is revealed)
Nabiy is any one who receives a revelation from Allah. If this revelation is a new Message with new regulations such as Islam then the Nabiy is given the additional title of Rasool.
The Saviour, the Christ. -Sufi. Vedanta: Avatar. (1a) The Messenger of God; the Avatar (q.v. for full definition). See also Muhammad, the Prophet. -Sufi. (1b) The Saviour, the Christ, the Avatar. -Arabic. (Du)(L) the: The Incarnation of God, the Infinite in human form. The God-Man, Messiah, Avatar, Christ, Saheb-e-Zaman. (N1) (see also Avatar; Ed)