| noun | a collection of things sharing a common attribute “there are two classes of detergents” |
| noun | a body of students who are taught together “early morning classes are always sleepy” |
| noun | people having the same social, economic, or educational status “the working class” |
| noun | education imparted in a series of lessons or meetings “he took a course in basket weaving” |
| noun | a league ranked by quality “he played baseball in class D for two years” |
| noun | a body of students who graduate together “the class of '97” |
| noun | (biology) a taxonomic group containing one or more orders |
| noun | elegance in dress or behavior “she has a lot of class” |
| verb | arrange or order by classes or categories “How would you classify these pottery shards--are they prehistoric?” |
| classify | verb | assign to a class or kind |
| class | verb | arrange or order by classes or categories |
| categorial | adjective | of or relating to the concept of categories |
| categorical | adjective | relating to or included in a category or categories |
| categoric | adjective | relating to or included in a category or categories |
| categorize | verb | place into or assign to a category |
| classy | adjective | elegant and fashionable; ; ; ; - Julia Child |
| classificatory | adjective | relating to or involving classification: |
| class | noun | a league ranked by quality |
| classification | noun | a group of people or things arranged by class or category |
| classifier | noun | a person who creates classifications |
| sort | noun | a category of things distinguished by some common characteristic or quality |
| sorter | noun | a clerk who sorts things (as letters at the post office) |
| sorting | noun | an operation that segregates items into groups according to a specified criterion |
| assortment | noun | the act of distributing things into classes or categories of the same type |