GP used 'higher-order' to mean higher in some ontology of abstraction, similar to 'meta', à la 'higher-order function'. In this case, in https://en.wikipedia.or

GP used 'higher-order' to mean higher in some ontology of abstraction, similar to 'meta', à la 'higher-order function'. In this case, in https://en.wikipedia.org/wiki/Meta-ethics https://en.wikipedia.org/wiki/Meta-ethics Speaking of today's submissions, Wikipedia might need some discussion of its own about what to do with these articles all about pretty much the same thing: https://en.wikipedia.org/wiki/Metadiscourse https://en.wikipedia.org/wiki/Metadiscourse https://en.wikipedia.org/wiki/Meta-discussion https://en.wikipedia.org/wiki/Meta-discussion https://en.wikipedia.org/wiki/Meta-communication https://en.wikipedia.org/wiki/Meta-communication (meta: username checks out)