class
n. countable A1 Beginner Oxford US //ˈkɫæs// UK //klˈɑːs// class
n. a group of students who learn together with a teacher. It can also mean the period of time when you are in school learning a specific subject.
n. a group of students taught together; a period of instruction in a particular subject.
I have a math class at ten o'clock.
The teacher asked the class to open their books to page forty-two and start reading quietly.
While the morning class focuses primarily on grammar and syntax, the afternoon session encourages students to apply those rules through intensive conversational practice.
Usage
Often used without an article in phrases like 'in class' or 'after class'.