Malibu Beach (mălˈĭbō) [key], resort and residential area (1990 est. pop. 10,000), S Calif., W of Los Angeles and near Santa Monica. Due to its relative reclusiveness, Malibu Beach is home to many of those in the film, television, and entertainment businesses. Elaborate residences line a beach escarpment above a sandpit extending into Santa Monica Bay. A branch of Pepperdine Univ. is also there.