Definition of so conjunction from the Oxford Advanced Learner's Dictionary

      

    so

     conjunction
    conjunction
    BrE BrE//səʊ//
     
    ; NAmE NAmE//soʊ//
     
     
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  1. 1  used to show the reason for something It was still painful so I went to see a doctor.
  2. 2  so (that…) used to show the result of something Nothing more was heard from him so that we began to wonder if he was dead.
  3. 3  so (that…) used to show the purpose of something But I gave you a map so you wouldn't get lost! She worked hard so that everything would be ready in time.
  4. 4  used to introduce the next part of a story So after shouting and screaming for an hour she walked out in tears.
  5. 5  (informal) used to show that you think something is not important, especially after somebody has criticized you for it So I had a couple of drinks on the way home. What's wrong with that? ‘You've been smoking again.’ ‘So?’
  6. 6  (informal) used to introduce a comment or a question So, let's see. What do we need to take? So, what have you been doing today?
  7. 7(informal) used when you are making a final statement So, that's it for today.
  8. 8(informal) used in questions to refer to something that has just been said So there's nothing we can do about it? ‘I've just got back from a trip to Rome.’ ‘So, how was it?’
  9. 9used when stating that two events, situations, etc. are similar Just as large companies are having to cut back, so small businesses are being forced to close.
  10. Word Originconjugation Old English swā, of Germanic origin; related to Dutch zo and German so.Idioms (informal) used to show that you think something is not important, especially after somebody has criticized you for it ‘He's fifteen years younger than you!’ ‘So what?’ So what if nobody else agrees with me?
See the Oxford Advanced American Dictionary entry: so