People arguing about vocabulary
Game Dev here: The usage of the word hitbox in CoH2 is generally correct but purists will quarrel that it is wrong. The target size/received accuracy in CoH2 is rightful considered as a hitbox in layman terms but the keyword defines a different collision constraint. All the collision stuff all fall into the same English and Game Dev definition as hitbox, despite them not being a box per say, some think of it as spheres, some others as boxes, depending on game engine, entities, and definitions, but for everyday discussions, the term hitbox is generally good enough.
/Offtopic. My intention is to help with information otherwise people will argue about engine schematics, drag things off-topic even further and make things even more convoluting for the sake of just being right, despite them being wrong. This should clarify things and close that subject. I personally don't think there's a requirement to write a thesis or to argue the choice of English words and to derail a thread over vocabulary.