The Parti Melayu Semangat 46 or Spirit of 46 Malay Party (S46) is a now defunct Malaysian political party. The party was formed in 1988, and dissolved in 1996. It was formed by Tengku Razaleigh Hamzah's "Team B" faction of the United Malays National Organisation (UMNO), as a challenge to prime minister Mahathir Mohamad and UMNO. Razaleigh had the personal support of former UMNO prime ministers Tunku Abdul Rahman and Hussein Onn, both of whom had also fallen out with Mahathir.