1. part of speechGrammar
Wikipedia definition
2. Part of speechIn grammar, a part of speech (also a word class, a lexical class, or a lexical category) is a linguistic category of words (or more precisely lexical items), which is generally defined by the syntactic or morphological behaviour of the lexical item in question. Common linguistic categories include noun and verb, among others. There are open word classes, which constantly acquire new members, and closed word classes, which acquire new members infrequently if at all.
Read “Part of speech” on English Wikipedia
Read “品詞” on Japanese Wikipedia
Read “Part of speech” on DBpedia


to talk about this word.