Edit: Woops, this was supposed to be an answer to your parent (zecho), not you. A common definition must not necessarily be a correct definition - ask any scie

Edit: Woops, this was supposed to be an answer to your parent (zecho), not you. A common definition must not necessarily be a correct definition - ask any scientist, there's probably a number of terms that are misused by the general populace in every field. As a very general example, theory and hypothesis come to mind. When most people say "theory", they mean what in a scientific context would be referred to as a hypothesis - an unproven claim that requires verification. Now, we can argue whether or not evolution of language justifies using wrong definitions of a term, but technically, defining "anarchy" as "chaos" is - in my opinion - not correct. The term denotes a state of society where there is no governing authority, but does not imply the absence of rules, laws or values. The major problem I have with these two definitions is that people who assume the negative one (anarchy == chaos) are, for the most part, not aware of the other meaning, and that quickly leads to confusion - which is sometimes used intentionally to defame opponents in an argument. I personally try to make it clear upfront which definition I am using (anarchy == absence of government or authority), but it's sometimes still hard to escape the negative association of the term.