Thayer's Greek Lexicon

 1. a throne seat
  1) a chair of state having a footstool
  2) assigned in the NT to kings, hence, kingly power or royalty
1b1. metaph. to God, the governor of the world
1b2. to the Messiah, Christ, the partner and assistant in the
divine administration
1b  1) hence divine power belonging to Christ
1b3. to judges i.e. tribunal or bench
1b4. to elders