What is the meaning of so?

noun

• The syllable naming the fifth (dominant) note of any musical scale in solmization.
  • synonyms: sol, soh

adverb

• To a very great extent or degree.
  • usage: "the idea is so obvious"; "never been so happy"; "I love you so"; "my head aches so"
• In a manner that facilitates.
  • usage: "he observed the snakes so he could describe their behavior"; "he stooped down so he could pick up his hat"
• In such a condition or manner, especially as expressed or implied.
  • usage: "They're happy and I hope they will remain so"; "so live your life that old age will bring no regrets"
• To a certain unspecified extent or degree.
  • usage: "I can only go so far with this student"; "can do only so much in a day"
• In the same way; also.
  • usage: "I was offended and so was he"; "worked hard and so did she"
• In the way indicated."hold the brush so"; "set up the pieces thus"; (`thusly' is a nonstandard variant)
  • synonyms: thus, thusly
• Usually followed by `that'. ( to an extent or degree as expressed)
  • usage: "he was so tired he could hardly stand"; "so dirty that it smells"
• Subsequently or soon afterward (often used as sentence connectors. )
  • usage: "then he left"; "go left first, then right"; "first came lightning, then thunder"; "we watched the late movie and then went to bed"; "and so home and to bed"
  • synonyms: then, and so, and then
• Used to introduce a logical conclusion. ( from that fact or reason or as a result)
  • usage: "therefore X must be true"; "the eggs were fresh and hence satisfactory"; "we were young and thence optimistic"; "it is late and thus we must go"; "the witness is biased and so cannot be trusted"
  • synonyms: therefore, hence, thence, thus
• In truth (often tends to intensify. )
  • usage: "they said the car would break down and indeed it did"; "it is very cold indeed"; "was indeed grateful"; "indeed, the rain may still come"; "he did so do it"
  • synonyms: indeed