A tagset is a list of part-of-speech tags (POS tags for short), i.e. labels used to indicate the part of speech and sometimes also other grammatical categories (case, tense etc.) of each token in a text corpus.
HunMorph part-of-speech tagset was previously available in Hungarian corpora by the Hunmorph morphological analyzer. Nowadays is replaced with Hungarian emMorph-based part-of-speech tagset.