Thayer's Greek Lexicon

 1. one who executes the commands of another, esp. of a master,
a servant, attendant, minister
  1) the servant of a king
  2) a deacon, one who, by virtue of the office assigned to him
by the church, cares for the poor and has charge of and
distributes the money collected for their use
  3) a waiter, one who serves food and drink

For Synonyms see entry G5834