

Dictionaries do not exhaustively discuss topics and the scope of meanings of terms, they give you a colloquially-oriented summary of what they mean to help you, for example, parse a conversation that uses the word in passing.
John Locke being a liberal isn’t an “alternative fact”, you’re just a troglodyte.


Presumably “decadent” here means “glorifying capitalism” or wasteful excess more generally, which (not unlike what happened with Germany) is one of the main ways that South Korean media exports try to pander to people’s more base desires and these are used to try to exert soft power. It’s probably not the best way to go about things, but I’m not in or managing a country under siege.