When people ask me if I'm excited about such and such upcoming event or other, I'll often say that I'm trying not to think about it much because I know that won't help. If I look forward to something, I can't stop thinking about it, which doesn't allow me peace of mind and mars the moment when it finally comes. Excited, it almost has a bad connotation as applies to me, unless it's for a short time period. I'm quite quite pleased with this definition, then. "Agitated?" That's never a good thing. "Stimulated to activity," that follows naturally. When excited isn't a bad thing, activity should come next. Either you see that movie you've been waiting for or you work for that cause you just found out about. The only thing I'm surprised isn't in this definition is time. People usually use it to describe looking forward to something. That's covered in the second part only in a round-about way. Dictionaries are usually so detailed, but this time it could be more specific.