Source : Webster's Revised Unabridged Dictionary (1913)

Off \Off\, prep.
   Not on; away from; as, to be off one's legs or off the bed;
   two miles off the shore. --Addison.

   {Off hand}. See {Offhand}.

   {Off side}
   (Football), out of play; -- said when a player has got in
              front of the ball in a scrimmage, or when the ball
              has been last touched by one of his own side
              behind him.

   {To be off color}, to be of a wrong color.