No definition of words can be regarded as final. Any definition of words is always a formalism. And even considering that it is a formalism, it cannot be treated strictly, because people have different understandings of words, and different definitions of individual words are possible. That is, you can write some strict definition, yes, while we are already saying beforehand that a definition cannot be strict. But when you use words, every word can have different associations for different people. Thus, even the use of words within a definition already branches the understanding of that definition.
