Thayer's Greek Lexicon

 1. power of choice, liberty of doing as one pleases
  1) leave or permission
2. physical and mental power
  1) the ability or strength with which one is endued, which
he either possesses or exercises
3. the power of authority (influence) and of right (privilege)
4. the power of rule or government (the power of him whose will
and commands must be submitted to by others and obeyed)
  1) universally
4a1. authority over mankind
  2) specifically
4b1. the power of judicial decisions
4b2. of authority to manage domestic affairs
  3) metonymically
4c1. a thing subject to authority or rule
4c  1) jurisdiction
4c2. one who possesses authority
4c  1) a ruler, a human magistrate
4c  2) the leading and more powerful among created beings
superior to man, spiritual potentates
  4) a sign of the husband's authority over his wife
4d1. the veil with which propriety required a women to cover
herself
  5) the sign of regal authority, a crown

For Synonyms see entry G5820