I've thought for years that when you are upset, it means "you've just heard some unexpected news or something shocking, and as a result, you're not calm and probably you can't judge as correctly as usual." (I think it's a common translation found for the word "慌てた" in Japanese-English dictionaries.)
But I find in many English dictionaries, in paper, or online, it's said to mean "be irritated" or "be angry". Was I wrong, or is my explanation not wrong but a rarer usage?
If it means "be angry", let me ask two more questions.
- Has the meaning changed? Older English dictionaries don't tend to explain much in this regards. They only say "disturbing" = "vomitting" or so.
- Are there any English word that corresponds to my "old" meaning? "lost calmness" or so?