n. 1
A group, collection, category or set sharing characteristics or attributes.
That is one class-A heifer you got there, sonny.
n. 2
A social grouping, based on job, wealth, etc. In Britain, society is commonly split into three main classes: upper class, middle class and working class.
n. 3
The division of society into classes.
Jane Austen's works deal with class in 18th-century England.

Related words

Word family: class-conscious classist classmate class-orientation classy classification classify
Phrases: upper class working-class class action word class lower-class form class second-class class warfare

Forms

or Class?

A class is a number or body of persons or objects having common pursuits, purposes, attributes, or characteristics.

J. C. Fernald, English Synonyms and Antonyms (1914)

Use in printed books, per decade from 1850 to 2019.

3 letters: set¹, ilk¹
4 letters: year¹, kind¹, head¹, type¹, form¹, race¹, sort¹, rank¹, clan¹
5 letters: group¹, order², range¹, grade¹, genre², tribe¹, breed¹, caste¹, forme
6 letters: school¹, family³, course¹, degree², estate², circle², polish², stripe¹, rubric²
7 letters: species², variety⁴, arrange², stratum², classis
8 letters: division³, category⁴
9 letters: community⁴
10 letters: assortment³
11 letters: description³, predicament⁴
12 letters: denomination⁵

The small number after each word is its number of syllables (order² = 2 syllables).