For all intents and purposes, anyone classified as a minor would be included in "children". So per the US definition of a minor, anyone under 18 years of age.
I don't generally find it necessary to discuss or post about, but I'll stick to the age of consent / age of majority where I live, which is 18.
Due to this being a matter of legal import I would assume yes that is the definition that matters to AOU. The medical definition of "child" is one that is used to do what AOU is preventing with this clarification.
(post is archived)