Babism definition by Webster's New World
a Persian religion founded c. 1844 by the Bab (Mirza Ali Mohammed): it forbids begging, drinking alcoholic liquors, buying and selling slaves, having more than one wife, etc.
Babism definition by American Heritage Dictionary
A 19th-century religious movement arising out of Shiism that asserted a new revelation and a new law, claiming to supersede Islamic law and demanding extensive social reforms. One of its followers founded the Baha'i faith in 1863.