If you say that you were ~ by something, you are emphasizing how surprised you were by it. (BRIT INFORMAL)
I was really ~ when I saw your picture of a model wearing a hat with a toy airplane on it.
= stunned
ADJ emphasis
If you say that you were ~ by something, you are emphasizing how surprised you were by it. (BRIT INFORMAL)
I was really ~ when I saw your picture of a model wearing a hat with a toy airplane on it.
= stunned
ADJ emphasis
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012