What is Imamite?

Imamite definition and meaning on Dictionary terms:
noun Islam.
a member of the principal sect of ShiE?ah, believing in a succession of twelve divinely inspired imams, beginning with Ali and ending with Muhammad al-Muntazar (d. a.d. c880), who supposedly retired to a cave, later to return as the Mahdi.

Also IA.maA.mi [ih-mah-mee] /EaE?mE?a??mi/.

Origin of Imamiteimam + -ite1

Also called Twelver.