1 [not before noun]
unhappy and worried because something unpleasant or disappointing has happened
upset by/about/at etc
She was really upset about the way her father treated her.
Debbie was upset that he didn't spend more time with her.
if you are upset with someone, you are angry and annoyed with them:
You're not still upset with me, are you?
an illness that affects the stomach and makes you feel sick