
I think that the ding an sich of a meaning is the relationship with the object or the thing that you want to say what it means. Is the creation that makes your mind. This involves what you think of the object and all the relations you make with your experiences to make up a meaning.
When you need to explain something or give a meaning to a word you start thinking in way to represent something or give the word any sence well that is the ding an sich of a meaning, is the way you let your mind stabish conections and relationships with the word you want to define.
The meaning of thing always changes because it depends on the point of view of each person also in the things you have learn and the experiences you have had so if we want to know what is the ding an sich of a meaning we can say that it can always change, but it always have like a base that is the relationship with the things you want to represent.