Hi John. I'm not so sure there is a "true" definition of ANY word, including "culture". Words are mallible things and open to the interpretation of the people using them. And definitions, like everything else, are also constantly evolving.
That being said i'm not really sure what you are trying to say here. I can't tell whether you are agreeing with me or not. My point about the finest examples of keris in European museums being collected as new was merely meant as an encouragement for people to consider the collection of new keris, since some of them are at an extremely high level of keris art and will no doubt find themselves in some museum somewhere 200 or 300 yrs. from now.