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https://www.merriam-webster.com/dictionary/audit https://www.merriam-webster.com/dictionary/audit Definition 2 under the verb form

• User23 4y ago
  I don’t know if it’s still true, but it at least used to be the case that one could ask a professor’s permission to just show up for lectures even without any formal relationship with the school.
  • dooglius 4y ago
    I'm sure it's still true that you can ask! Whether it works I expect will depend on the professor.
  • f1shy 4y ago
    AFAIK in many countries and universities around the world this is no problem in 90% of the cases. Good professors are more than happy to have you there. One I even asked to take the exam, and get it corrected (to test if I really learned the content). And they allowed me to do that, I got the corrected exam at the end. Of course, it was not written in any book in the university.
• f1shy 4y ago
  Comes from latin "audire" to hear.