(1.) A Dhimmi, or Zimmi (Arabic ذمّي), as defined in classical Islamic legal and political literature, is a person living in a Muslim state who is a member of an officially tolerated non-Muslim religion. The term literally means "protected person."

(2.) Christians and Jews (and sometimes others) in traditional Islamic empires. They had a recognized but very subordinate legal status.
Source 1 WordIQ
Source 2 Urban Dictionary