He has abandoned all ten of the fetters that bind the mind to the cycle of rebirth and heart free of mental effluents. The Ten Fetters are: self-identification views, uncertainty, grasping at precepts and practices; sensual passion, resistance; passion for form , passion for formless phenomena, conceit, restlessness, and unawareness.
Arahant is the Pali form of the Sanskrit/Vedic word arhat. See under this term for a more technically-oriented explanation. Also arahat.
See also: Buddha, Buddhism, List of Buddhist terms and concepts.