My definition of a hero is someone who has dramatically changed something or way of doing something or someone who has made a BIG change in any way that is positive. A hero characteristics should be: loyal, caring, kind, respectful, and most of all determined, they should always be determined to do something that is positive and something that will make an change for the best of things. And I truely dont think that the definition of an hero will change over time, but I do think that the different things that makes them an hero may change.