A group of people or things that are related in some way.

A category or division of a subject or activity.

एक विषय या गतिविधि की श्रेणी या विभाग।

English Usage: He graduated with a degree in the class of biology.

Hindi Usage: उसने जीव विज्ञान की कक्षा में डिग्री प्राप्त की।