Dictionary definition of "so"
1. In the condition or manner expressed or indicated; thus: Hold the brush so.
2. To the amount or degree expressed or understood; to such an extent: She was so weary that she fell.
3. To a great extent; to such an evident degree: But the idea is so obvious.
4. Because of the reason given; consequently: She was weary and so fell.
5. Afterward; then: to the gas station and so home.
6. In the same way; likewise: You were on time and so was I.
7. Apparently; well, then. Used in expressing astonishment, disapproval, or sarcasm: So you think you've got troubles?
8. In truth; indeed: "You aren't right." "I am so!"
adj.
1. True; factual: I wouldn't have told you this if it weren't so.
2. In good order: Everything on his desk must be exactly so.
conj. Usage Problem
1. With the result or consequence that: He failed to appear, so we went on without him.
2. In order that: I stayed so I could see you.
pron.
Such as has already been suggested or specified; the same: She became a loyal friend and remained so.
interj.
Used to express surprise or comprehension: So! You've finished your work at last.
Idioms:
so as to
In order to: Mail your package early so as to ensure its timely arrival.
so that
1. In order that: I stopped so that you could catch up.
2. With the result or consequence that.
so what
Used to express contempt or lack of interest.