The term ministry can refer to the following:

Ministry (government department), a department of a government
Ministry (collective executive) (often the Ministry), the complete body of government ministers (whether or not they are in cabinet) under the leadership of a prime minister

• The Ministry, also known as the Aireacht, the cabinet of the government established by the revolutionary Irish Republic of 1919-1922.
  Christian ministry, activity by Christians to spread or express their faith Religion
  
  The Ministry of Magic, in the Harry Potter series.