Meaning

noun a collection of things sharing a common attribute

noun a body of students who are taught together

noun people having the same social, economic, or educational status

originFrom Middle French classe, from Latin classis (“a class or division of the people, assembly of people, the whole body of citizens called to arms, the army, the fleet, later a class or division in general”), from Proto-Indo-European *kelh₁- (“to call, shout”). Doublet of clas and classis.

Etymology from Wiktionary, CC BY-SA 3.0