Tactical chess is about moves that force your opponent to react immediately. Positional chess is about fighting for key squares and putting your pieces on better squares.
Larry Evans says it like this(I don't recall the these exact words but something like this): "Chess strategy is the art of attacking the chess board; Chess tactics is the art of attacking the chess set."
You're probably going to get some varying opinions on this, so brace yourself!
Between tactical, and positional chess?