category
noun
ˈkætəɡəri 
ˈkætəɡɔːri a group of people or things with particular features in common
Synonym
classStudents over 25 fall into a different category.The results can be divided into three main categories.
Definition of category noun from the Oxford Advanced Learner's Dictionary
ˈkætəɡəri ˈkætəɡɔːri 