A chair in a dream can point to status -- who holds a position of authority, or who's missing from one. An empty chair often reflects someone absent from your life whose presence you still feel, while sitting and waiting in one can mirror a decision you're putting off making.
Divers Effects of the Stars are drawn forth from the stars, according to the various dispositions of the matter; whereof the Astrologer ought very well to examine the several natures and qualities of the subjects receiving. - William Lilly (1602.-1681.)