We read in newspapers and watch on TV many cases regarding students gunning down their classmates and teachers.
Suppose a student brought a gun to class, pointed it at his friends and teachers, and started terrorizing them. And then, later, gunned a few of them down. Why isn't this act called ‘terrorism’ and why isn't he called a ‘terrorist’? I have never seen the words terrorist or terrorism used to refer to these people or their acts in the media. Does the mass media knowingly omit these words due to sentimental reasons (considering the family of the murderer or something like that)? Or is it because it's inappropriate to use those words?
I've come to learn that the word terrorism is from the French, terrorisme, which is derived from the Latin verb terreō meaning “I frighten”. I believe then it is apt for the above mentioned situation. Does the word terrorism actually refer to an act committed by a group of people? And is that why the terms are not used in the above explained situation? I have also read the answers on Usage of "terrorist" in english.stackexchange.com. But they didn't clear my doubts.
Can anybody help me find the correct definition and usage of the words terrorism and terrorist? Especially on this point—does terrorism refer to an act performed by a group of people?