1. conjunction /səʊ,soʊ/
a) In order that.
Eat your broccoli so you can have dessert.
b) With the result that; for that reason; therefore.
I was hungry so I asked if there was more food.
2. adverb /səʊ,soʊ/
a) Very.
He is so good!
b) To a particular extent.
It’s not so bad.
3. adjective /səʊ,soʊ/
a) true.
That is so.
b) In that state, with that attribute. Replaces the aforementioned adjective phrase.
You are responsible for this, is that not so?
4. interjection /səʊ,soʊ/
a) Used after a pause for thought to introduce a new topic, question or story.
So, lets go home.
b) Shortened form of "So what?"
So, whatll you have?
5. noun /səʊ,soʊ/
A syllable used in solfège to represent the fifth note of a major scale.
6. preposition /səʊ,soʊ/
Wikipedia foundation.