Thayer's Greek Lexicon

 1. service, ministering, esp. of those who execute the commands of others
2. of those who by the command of God proclaim and promote
religion among men
  1) of the office of Moses
  2) of the office of the apostles and its administration
  3) of the office of prophets, evangelists, elders etc.
3. the ministration of those who render to others the offices of
Christian affection esp. those who help meet need by either
collecting or distributing of charities
4. the office of the deacon in the church
5. the service of those who prepare and present food