In grammar , a lexical category -LRB- also word class , lexical class , or in traditional grammar part of speech -RRB- is a linguistic category of words -LRB- or more precisely lexical items -RRB- , which is generally defined by the syntactic or morphological behaviour of the lexical item in question .

In grammar , a lexical category -LRB- also word class , lexical class , or part of speech -RRB- is a type of word .
