People have a great many misconceptions about dictionaries. For a start, we assume that dictionaries are authorities—that the usages of a word listed in the dictionary are allowed, and that other usages are not. We assume that words not in the dictionary are not words, and words in the dictionary but labeled “obsolete” are no longer allowed. And we assume these things because we fundamentally misunderstand what a dictionary is.
We think dictionaries are arbiters of language, determining what is and isn’t allowed. But, in reality, dictionaries are just records of language. They preserve old ideas, record new ideas, and describe how language is being used. They are slow to catch up, but not that slow, and they occasionally retain things we would rather forget.
We have many of the same misconceptions about government.