To sit at, to rest under; to be subject to. [Obs.]

``A farmer can not husband his ground so well if he sit at a great rent''. --Bacon.

To sit at meat or at table, to be at table for eating.

To sit down.
   (a) To place one's self on a chair or other seat; as, to sit down when tired.
   (b) To begin a siege; as, the enemy sat down before the town.
   (c) To settle; to fix a permanent abode. --Spenser.
   (d) To rest; to cease as satisfied. ``Here we can not sit down, but still proceed in our search.'' --Rogers.

To sit for a fellowship, to offer one's self for examination with a view to obtaining a fellowship. [Eng. Univ.]

To sit out.
   (a) To be without engagement or employment. [Obs.]

--Bp. Sanderson.
   (b) To outstay.

Source: Webster's Revised Unabridged Dictionary (1913)