Definition of upset adjective from the Oxford Advanced Learner's Dictionary

      

    upset

     adjective
    adjective
    BrE BrE//ˌʌpˈset//
     
    ; NAmE NAmE//ˌʌpˈset//
     
    Unhappiness, Disappointment, Being ill
     
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  1. 1  [not before noun] upset (about something) | upset (that…) unhappy or disappointed because of something unpleasant that has happened There's no point getting upset about it. I understand how upset you must be feeling. She was upset that he had left without saying goodbye. See related entries: Unhappiness, Disappointment
  2. 2  an upset stomach an illness in the stomach that makes you feel sick or have diarrhoea I've been off work with an upset stomach. See related entries: Being ill
  3. Extra examples He was upset at missing all the excitement. I think she may be a bit upset with you. She was still upset about her divorce. She’s obviously deeply upset by his behaviour. The incident had left him visibly angry and upset. upset by the death of their pet There’s no point getting upset about it.
See the Oxford Advanced American Dictionary entry: upset