General and philosophical use. In philosophy, it refers to fundamental categories of thought or being, such as Aristotle's categories or Kant's categories of understanding.
This problem falls into a different category.
Kant proposed twelve categories.
This problem falls within the category of economics.
This phenomenon belongs to the category of physics.
His opinion doesn't go beyond a personal impression.
That question is outside the scope of this discussion.
カテゴリー is a common loanword used casually and in technical fields, whereas 範疇 sounds more formal and literary.
部類 is a plainer, everyday word for a general grouping, while 範疇 carries a more scholarly or philosophical tone.
範疇 refers to a conceptual category something belongs to, while 範囲 refers to a range or scope of extent; the two share the kanji 範 but mean different things.
Standard kanji spelling.
Search-only form; not a standard written variant.
From Chinese 範疇 (fànchóu), originally a translation of Greek katēgoria in philosophical contexts. The kanji 範 means 'pattern' or 'model', and 疇 means 'class' or 'category'.