Definition of "So" :

noun: the syllable naming the fifth (dominant) note of any musical scale in solmization

adverb: in truth (often tends to intensify)

"He did so do it!."

adverb: (used to introduce a logical conclusion) from that fact or reason or as a result

"The witness is biased and so cannot be trusted."

adverb: subsequently or soon afterward (often used as sentence connectors)

"And so home and to bed."

adverb: in a manner that facilitates

"He observed the snakes so he could describe their behavior."

adverb: in the way indicated

"Hold the brush so."

adverb: to a very great extent or degree

"The idea is so obvious."

adverb: (usually followed by that') to an extent or degree as expressed

"He was so tired he could hardly stand."

adverb: in such a condition or manner, especially as expressed or implied

"They're happy and I hope they will remain so."

adverb: to a certain unspecified extent or degree

"I can only go so far with this student."

adverb: in the same way; also

"I was offended and so was he."