ตัอย่างคำจำกัดความหนึ่งของ หนังคลาสสิค ครับ
What is the definition of a Classic Film? Well, it depends. Some would say that a "classic film" is any movie made during the days that the Hollywood studio system was in place. In those pre-1970's days, most actors and actresses were under exclusive contracts to a single studio. If they worked for another studio at all, it was usually because of a trade, or some other arrangement, between the studio bosses. Others would say that any film which receives wide acclaim from film critics, or with (e.g. Academy) award recognition, would earn the standard and should be dubbed a classic film. Unfortunately, both of these methods are suspect due to personal prejudices, errors of omission, and even corruption.
So, how do I define Classic Film? Using a little of both, actually. For the purposes of this site, a "classic film" is any movie made during the Hollywood studio system era which has also received significant recognition, either at the time it was released or subsequently, by connoisseurs of great movies (such as me). If you find this definition to be a bit too vague, you should realize that that was exactly my intent!
ref :
http://www.classicfilmguide.com/